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stock image Dendritic cells present antigens (green) to lymphocytes through their membran bound MHC-molecules (violet). CD4 molecules (light blue) bind to other portions of the MHC, strengthening the interaction.

Dendritic Cells Present Antigens (green) To Lymphocytes Through Their Membran Bound MHC-molecules (violet). CD4 Molecules (light Blue) Bind To Other Portions Of The MHC, Strengthening The Interaction.

Image, 10.24MB, 8000 × 6000 jpg
stock image Cancer cells express PD-L1 (orange) proteins on their surface to trick the immune system. The interaction of PD-L1 with PD-1 of  T-cells leads to a down-regulation of T-cells. The antibody (yellow) blocks this interaction.

Cancer Cells Express PD-L1 (orange) Proteins On Their Surface To Trick The Immune System. The Interaction Of PD-L1 With PD-1 Of T-cells Leads To A Down-regulation Of T-cells. The Antibody (yellow) Blocks This Interaction.

Image, 18.3MB, 8000 × 6000 jpg
stock image Structure of human hormone insulin-like peptide-3 heterodimer, 3D cartoon and Gaussian surface models, white background

Structure Of Human Hormone Insulin-like Peptide-3 Heterodimer, 3D Cartoon And Gaussian Surface Models, White Background

Image, 3.16MB, 10000 × 4000 jpg
stock image Calmodulin, inactive-calcium free (left), and activated  (right) conformations,

Calmodulin, Inactive-calcium Free (left), And Activated (right) Conformations,

Image, 2.57MB, 8000 × 6000 jpg
stock image The sense of smell detects airborne molecules via olfactory receptors in the nasal cavity, sending signals to the brain for perception

The Sense Of Smell Detects Airborne Molecules Via Olfactory Receptors In The Nasal Cavity, Sending Signals To The Brain For Perception

Image, 1.95MB, 5670 × 3971 jpg
stock image cellular health concept, processes that contribute to the optimal functioning of organism cells, mind map sketch

Cellular Health Concept, Processes That Contribute To The Optimal Functioning Of Organism Cells, Mind Map Sketch

Image, 14.22MB, 5600 × 3733 jpg
stock image The T-cell receptor activates the immune response to antigens in T-lymphocytes. T-cell receptors (dark blue), CD4 molecules (light blue), glycolipids (orange). 3d rendering. Illustration

The T-cell Receptor Activates The Immune Response To Antigens In T-lymphocytes. T-cell Receptors (dark Blue), CD4 Molecules (light Blue), Glycolipids (orange). 3d Rendering. Illustration

Image, 3.11MB, 8000 × 6000 jpg
stock vector Glucose transport through cell membrane via transporters

Glucose Transport Through Cell Membrane Via Transporters

Vector, 14.07MB, 5556 × 3700 eps
stock image Estrogen receptor beta dimer in complex with estradiol, 3D cartoon model, chain id color scheme, based on PDB 5toa, white background

Estrogen Receptor Beta Dimer In Complex With Estradiol, 3D Cartoon Model, Chain Id Color Scheme, Based On PDB 5toa, White Background

Image, 2.91MB, 6000 × 4000 jpg
stock image Crystal structure of a photoactivated rhodopsin, 3D cartoon model isolated, white background

Crystal Structure Of A Photoactivated Rhodopsin, 3D Cartoon Model Isolated, White Background

Image, 1.92MB, 6000 × 4000 jpg
stock image Structure of human Activin A homodimer, 3D cartoon model, white background

Structure Of Human Activin A Homodimer, 3D Cartoon Model, White Background

Image, 1.88MB, 6000 × 4000 jpg
stock image Chemical formula, skeletal formula and 3D ball-and-stick model of cyclic adenosine monophosphate (cAMP), white background

Chemical Formula, Skeletal Formula And 3D Ball-and-stick Model Of Cyclic Adenosine Monophosphate (cAMP), White Background

Image, 1.42MB, 6500 × 4500 jpg
stock image T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Different stages of the interaction. 3D-Rendering. Illustration

T-cell Receptor In Complex With The MHC Class II-peptide Complex. The Antigen (light Green) Is A Peptide From A Tumor Cell, Bacteria Or Virus. Different Stages Of The Interaction. 3D-Rendering. Illustration

Image, 9.21MB, 8000 × 6000 jpg
stock image Calmodulin, a crucial messenger protein. Calmodulin has 4 Ca2+ binding sites.

Calmodulin, A Crucial Messenger Protein. Calmodulin Has 4 Ca2+ Binding Sites.

Image, 2.97MB, 8000 × 6000 jpg
stock image Crystal structure of VDR ligand binding domain complexed to calcipotriol (blue), 3D ball-and-stick model, white background

Crystal Structure Of VDR Ligand Binding Domain Complexed To Calcipotriol (blue), 3D Ball-and-stick Model, White Background

Image, 2.54MB, 4096 × 4096 jpg
stock vector cytokine storm cell signalling vector horizontal background

Cytokine Storm Cell Signalling Vector Horizontal Background

Vector, 6.45MB, 6300 × 4200 eps
stock image Structure of human calmodulin, 3D cartoon model with the differently colored elements of the secondary structure, white background

Structure Of Human Calmodulin, 3D Cartoon Model With The Differently Colored Elements Of The Secondary Structure, White Background

Image, 1.2MB, 5000 × 4000 jpg
stock image 3d computer illustration of the activation process of a Ras protein. Inactive Ras protein (left) is activated by a GEF protein opening the binding site and allowing GDP to exit. Afterwards GTP can bind to RAS turning it into the active form (right).

3d Computer Illustration Of The Activation Process Of A Ras Protein. Inactive Ras Protein (left) Is Activated By A GEF Protein Opening The Binding Site And Allowing GDP To Exit. Afterwards GTP Can Bind To RAS Turning It Into The Active Form (right).

Image, 7.61MB, 8000 × 6000 jpg
stock image Cyclic adenosine monophosphat (cAMP, red) is a second messenger used for signal transduction through the activation of various protein kinases (blue). The one in the foreground is protein kinase A. Source: PDB entry 3tnp.

Cyclic Adenosine Monophosphat (cAMP, Red) Is A Second Messenger Used For Signal Transduction Through The Activation Of Various Protein Kinases (blue). The One In The Foreground Is Protein Kinase A. Source: PDB Entry 3tnp.

Image, 7MB, 8000 × 6000 jpg
stock vector Guanosine triphosphate (GTP) molecule, it is used in synthesis of RNA and as a source of energy for protein synthesis. Structural chemical formula and molecule model. Vector illustration

Guanosine Triphosphate (GTP) Molecule, It Is Used In Synthesis Of RNA And As A Source Of Energy For Protein Synthesis. Structural Chemical Formula And Molecule Model. Vector Illustration

Vector, 0.51MB, 5000 × 3409 eps
stock image Immunologically active proteins on a T-cell. TCR (blue), CD-4 (light blue), CD-28 (dark blue),  PD-1 (magenta), CTLA-4 (violet), Ca-channel (dark violet). The T-cell receptor, CD-4 and CD-28 activate T-cells, while PD-1 and CTLA-4 inhibit the activat

Immunologically Active Proteins On A T-cell. TCR (blue), CD-4 (light Blue), CD-28 (dark Blue), PD-1 (magenta), CTLA-4 (violet), Ca-channel (dark Violet). The T-cell Receptor, CD-4 And CD-28 Activate T-cells, While PD-1 And CTLA-4 Inhibit The Activat

Image, 10.2MB, 8000 × 6000 jpg
stock image T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Complex embedded in the membranes. 3D-Rendering. Illustration

T-cell Receptor In Complex With The MHC Class II-peptide Complex. The Antigen (light Green) Is A Peptide From A Tumor Cell, Bacteria Or Virus. Complex Embedded In The Membranes. 3D-Rendering. Illustration

Image, 7.59MB, 8000 × 6000 jpg
stock image Structure of human interleukin-10, 3D cartoon model isolated, white background

Structure Of Human Interleukin-10, 3D Cartoon Model Isolated, White Background

Image, 2.14MB, 5000 × 3000 jpg
stock image   3D image of Inositol skeletal formula - molecular chemical structure of carbocyclic sugar Vitamin B8 isolated on white background

3D Image Of Inositol Skeletal Formula - Molecular Chemical Structure Of Carbocyclic Sugar Vitamin B8 Isolated On White Background

Image, 6MB, 8226 × 6888 jpg
stock image Thyroxine-thyroid hormone receptor interactions, 3D cartoon model, white background

Thyroxine-thyroid Hormone Receptor Interactions, 3D Cartoon Model, White Background

Image, 3.43MB, 6077 × 4083 jpg
stock image CAMP Cyclic Adenosine MonoPhosphate - second messenger important in many biological processes, acronym text on blackboard

CAMP Cyclic Adenosine MonoPhosphate - Second Messenger Important In Many Biological Processes, Acronym Text On Blackboard

Image, 11.5MB, 5760 × 3840 jpg
stock image Structure of the human androgen receptor, 3D cartoon model with the differently colored elements of the secondary structure, white background

Structure Of The Human Androgen Receptor, 3D Cartoon Model With The Differently Colored Elements Of The Secondary Structure, White Background

Image, 1.8MB, 6000 × 4000 jpg
stock image 3d computer illustration of an activated Ras protein. Ras proteins are involved in transmitting signals within cells turning on genes involved in cell growth, differentiation and survival. Mutations in ras genes can lead to permanently activated prot

3d Computer Illustration Of An Activated Ras Protein. Ras Proteins Are Involved In Transmitting Signals Within Cells Turning On Genes Involved In Cell Growth, Differentiation And Survival. Mutations In Ras Genes Can Lead To Permanently Activated Prot

Image, 4.61MB, 8000 × 6000 jpg
stock image Abstract illustration of the biological cell

Abstract Illustration Of The Biological Cell

Image, 13.99MB, 7680 × 4320 jpg
stock image T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Different stages of the interaction. 3D-Rendering. Illustration

T-cell Receptor In Complex With The MHC Class II-peptide Complex. The Antigen (light Green) Is A Peptide From A Tumor Cell, Bacteria Or Virus. Different Stages Of The Interaction. 3D-Rendering. Illustration

Image, 7.31MB, 8000 × 6000 jpg
stock image Insulin (green) binding to the insulin receptor (violet) activates the transport of glucose (yellow) into the cell (depicted in 2 phases) - Illustration

Insulin (green) Binding To The Insulin Receptor (violet) Activates The Transport Of Glucose (yellow) Into The Cell (depicted In 2 Phases) - Illustration

Image, 4.57MB, 4000 × 6200 jpg
stock image Insulin (green) binding to the insulin receptor (violet) activates the transport of glucose (yellow) into the cell. Illustration

Insulin (green) Binding To The Insulin Receptor (violet) Activates The Transport Of Glucose (yellow) Into The Cell. Illustration

Image, 6.21MB, 8000 × 6000 jpg
stock image T-cell receptor bound to a cell membrane

T-cell Receptor Bound To A Cell Membrane

Image, 2.94MB, 8000 × 6000 jpg
stock image The insulin receptor (blue) is a transmembrane protein, that is activated by insulin (orange). Insulin binding induces structural changes within the receptor that finally leads  to the activation of the glucose transporter protein.

The Insulin Receptor (blue) Is A Transmembrane Protein, That Is Activated By Insulin (orange). Insulin Binding Induces Structural Changes Within The Receptor That Finally Leads To The Activation Of The Glucose Transporter Protein.

Image, 12.2MB, 8000 × 6000 jpg
stock image Protein enzymes fold into their structure to fulfill their function - 3d illustration

Protein Enzymes Fold Into Their Structure To Fulfill Their Function - 3d Illustration

Image, 13.4MB, 7300 × 4000 jpg
stock image abstract illustration of the biological cell and the mitochondria

Abstract Illustration Of The Biological Cell And The Mitochondria

Image, 2.17MB, 3840 × 2160 jpg
stock image T-cell receptor in complex with the MHC class II-peptide complex. The antigen (light green) is a peptide from a tumor cell, bacteria or virus. Different stages of the interaction. 3D-Rendering. Illustration

T-cell Receptor In Complex With The MHC Class II-peptide Complex. The Antigen (light Green) Is A Peptide From A Tumor Cell, Bacteria Or Virus. Different Stages Of The Interaction. 3D-Rendering. Illustration

Image, 2.17MB, 8000 × 6000 jpg
stock image Insulin molecules

Insulin Molecules

Image, 2.16MB, 8000 × 6000 jpg
stock image  abstract illustration of the biological cell and the mitochondria

Abstract Illustration Of The Biological Cell And The Mitochondria

Image, 1.96MB, 3840 × 2160 jpg
stock image Abstract illustration of the biological cell

Abstract Illustration Of The Biological Cell

Image, 8.54MB, 7680 × 4320 jpg
stock image PD-1  (red) extends from the surface of a T-cell and interacts with the ligand protein PD-L1 (yellow) from a antigen presenting cell. Although the T-cell has been activated through the interaction of  a T-cell receptor (blue) and a MHC protein (viole

PD-1 (red) Extends From The Surface Of A T-cell And Interacts With The Ligand Protein PD-L1 (yellow) From A Antigen Presenting Cell. Although The T-cell Has Been Activated Through The Interaction Of A T-cell Receptor (blue) And A MHC Protein (viole

Image, 18.32MB, 8000 × 6000 jpg
stock vector Hormones, Receptors and Target Cells. each type of hormone is designed only certain cells. These cells will have receptors on them that are specific for a certain hormone. Vector illustration for medical, biological, and educational use

Hormones, Receptors And Target Cells. Each Type Of Hormone Is Designed Only Certain Cells. These Cells Will Have Receptors On Them That Are Specific For A Certain Hormone. Vector Illustration For Medical, Biological, And Educational Use

Vector, 2.77MB, 5013 × 5012 eps
stock vector cytokine storm cell signalling vector horizontal background

Cytokine Storm Cell Signalling Vector Horizontal Background

Vector, 6.6MB, 6300 × 4200 eps
stock image Rhodopsin is a light sensitive G-protein coupled receptor with retinal as cofactor.  that stimulates the G-protein transducin, resulting in the liberation of its  subunit. This GTP-bound subunit in turn activates cGMP phosphodiesterase.

Rhodopsin Is A Light Sensitive G-protein Coupled Receptor With Retinal As Cofactor. That Stimulates The G-protein Transducin, Resulting In The Liberation Of Its Subunit. This GTP-bound Subunit In Turn Activates CGMP Phosphodiesterase.

Image, 8.93MB, 8000 × 6000 jpg
stock image Structure of human interleukin-11, 3D cartoon model isolated, white background

Structure Of Human Interleukin-11, 3D Cartoon Model Isolated, White Background

Image, 2.35MB, 6000 × 4000 jpg
stock image Structure of insulin-like growth factor 1 (IGF-1), 3D cartoon model of the tertiary structure with the elements of the secondary structure colored, white background

Structure Of Insulin-like Growth Factor 1 (IGF-1), 3D Cartoon Model Of The Tertiary Structure With The Elements Of The Secondary Structure Colored, White Background

Image, 1.25MB, 6000 × 4000 jpg
stock vector Bio signaling cell communication network system, micro biological anatomy labeled diagram vector illustration with receptor, transduction and response activity.

Bio Signaling Cell Communication Network System, Micro Biological Anatomy Labeled Diagram Vector Illustration With Receptor, Transduction And Response Activity.

Vector, 5.4MB, 4167 × 4709 eps
stock image Structure of human endothelin-1, a polypeptide hormone regulator of blood pressure, 3D combined surface-cartoon model isolated, white background

Structure Of Human Endothelin-1, A Polypeptide Hormone Regulator Of Blood Pressure, 3D Combined Surface-cartoon Model Isolated, White Background

Image, 1.2MB, 6000 × 4000 jpg
stock image Structure of human interleukin-2, 3D cartoon model isolated, white background

Structure Of Human Interleukin-2, 3D Cartoon Model Isolated, White Background

Image, 2.46MB, 6000 × 4000 jpg
stock image 3D image of Inositol trisphosphate skeletal formula - molecular chemical structure of inositol phosphate signaling molecule isolated on white background

3D Image Of Inositol Trisphosphate Skeletal Formula - Molecular Chemical Structure Of Inositol Phosphate Signaling Molecule Isolated On White Background

Image, 3.87MB, 6943 × 5520 jpg
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