Click Here for More Images from iStock- 15% off with coupon 15FREEIMAGES 
A ball and stick + ribbons model of Human Growth Hormone, also known as Somatotropin.
Bacterial multidrug efflux pumps (E-CmeB) expel antibiotics  from inside the bacterium (bottom): ciprofloxacin (yellow), chloramphenicol (violet),  ampicillin (red).
Ring formation of thumbs ups like logos scattered into groups, symbolizing varied demographic positive opinions, crystal glass renders.
3D cartoon and Gaussian surface models, PDB 6vg8, white background
Glucose-6-phosphate dehydrogenase (G6PD) protein. Enzyme of the pentose phosphate pathway that generates co-enzyme NADPH. 3D illustration.
Single strand ribonucleic acid, RNA research
Cholera toxin, molecular model. Cholera toxin (choleragen) is a protein complex secreted by the bacterium Vibrio cholerae, that causes the disease cholera. It is made up of a wedge-shaped A subunit (right part of illustration) and five B subunits (left part of illustration) that form a ring which binds to the intestinal lining. In its most severe forms, cholera is one of the most rapidly fatal illnesses known.
The three-dimensional structure of proteins is represented in a variety of conformations. This image is based on the ribbon structure of a protein. It is suitable for biology notebooks and book covers.\nThis image has not been created by AI.
A ball and stick + ribbons model of human Interleukin 2 or IL-2. Interleukin is a hormone which acts as a signalling molecule for the immune system.
HER2 (light blue) and HER3 form a potent pro-oncogenic heterocomplex.  They play a  crucial role in cellular proliferation, survival, and differentiation.
Recombinant human insulin. 3d cartoon model based on protein data bank
RNA molecule,Epigenetics concept.
3D cartoon and Gaussian surface models, PDB 2j0D, white background.
Immunoglobulin G (IgG) - 3d rendered image. Microbiology illustration  the structure of an antibody. The Y-shaped structure. IgG is the most common type of antibody.
The crystal structure of the tumor marker protein. The 3D model of the biological macromolecule.
Phospholipid bilayer membrane structures that make up living cells and their contents. This is an image of membrane proteins in the membrane.\nThis image, which looks like a plastic model, evokes biology and biochemistry. It can be used as a cover for magazines, textbooks and presentation materials.\nThis image was not created by AI.
A ball and stick + ribbons model of beta-secretase - a protein that is important in forming healthy peripheral nerve cells, but is also involved in the onset of Alzheimer's disease.
Nucleosome, molecular model. 3D illustration. The nucleosome consists of a DNA double helix wrapped around a core of histone proteins.
PETase (left) degrades  polyethylene terephtalate (PET) into monohydroxyethyl terephthalate (MHET) and MHETase degrades MHET ethylene glycol (EG) and terephthalic acid (TPA).
Single strand ribonucleic acid, RNA research
3D cartoon and Gaussian surface models, PDB 3hg3, white background
DNA A-T Pair
A 3D rendering of a SpyTag-SpyCatcher conjugate, the molecular interaction between these biomolecules. This is used in various biotechnological applications for protein labeling and purification.
DNA Helix - 3d rendered image. Genetic research concept. Complex spiral structure illustration. Medical, science, genetic biotechnology, gene cell, chromosome idea. DNA strands on dark background . Science nanotechnology.
organic chemistry, model of the protein molecule - illustration of a biological particle
Different germs in the human intestines called microbiome,Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria
RNA polymerase II (blue) transcripts DNA (violet) into mRNA (red). A ribosome (blue-violet) translates the mRNA into a polypeptid that folds to a protein (orange).
X chromosome with degrading or aging telomeres isolated on white background
3D cartoon and Gaussian surface models, PDB 6gu2, white background
Computer generated 3D abstract forms.
Free Images: "bestof:PDB 1vlr EBI.jpg Alpha and beta proteins a+b HIT-like HIT-like mRNA decapping enzyme DcpS C-terminal domain mRNA decapping enzyme DcpS C-terminal domain Alpha"
Boat_bows_(3).jpg
Airline_Terminal_Windows.jpg
The_orange_fish_net_float..jpg
Wave hit on pier.jpg
Wrecked van that hit a tree.jpg
Sea waves hit on waves.jpg
The shallow water attention terminal swat boat.jpg
Zebra_Dove.jpg
Denver international airport.jpg
Bursting_Into_Life.jpg
Redrosedust wright f2000.jpg
150610-Z-NI803-196.jpg
150610-Z-NI803-032.jpg
150610-Z-NI803-485.jpg
150610-Z-NI803-490.jpg
150610-Z-NI803-007.jpg
150610-Z-NI803-359.jpg
150610-Z-NI803-619.jpg
141218-Z-NI803-060.jpg
141218-Z-NI803-093.jpg
140701-Z-NI803-014.jpg
Great_Indian_Hornbill..jpg
Gumbel-Density.svg
Greek lc alpha.svg
Alpha oxidation part I.svg
Alpha oxidation part III.svg
Alpha oxidation part II.svg
Alpha oxidation part IV.svg
Alpha oxidation part V.svg
Alpha lowercase.svg
Glutamate dehydrogenase reaction.svg
Ribosome mRNA translation gl.svg
D-LDH reaction.svg
MRNA structure gl.svg
AminoAcidball.svg
EcoRI restriction enzyme recognition site.svg
Genetic code mk.svg
AlphaHelixSection (blue).svg
Alpha-D-Galactopyranose.svg
Aspartate transaminase reaction.svg
SmaI restriction enzyme recognition site.svg
Alpha Dive Flag.svg
Alpha-D-Mannofuranose.svg
Alpha-D-Mannopyranose.svg
Alpha-D-Altrofuranose.svg
Alpha-D-Altropyranose.svg
Alpha-D-Gulofuranose.svg
Alpha-D-Gulopyranose.svg
Alpha-D-Idofuranose.svg
Alpha-D-Idopyranose.svg
Alpha-D-Galactofuranose.svg
Alpha-D-Talofuranose.svg
Alpha-D-Talopyranose.svg
Alpha-D-Psicofuranose.svg
Alpha-D-Psicopyranose.svg
Alpha-D-Sorbofuranose.svg
Alpha-D-Sorbopyranose.svg
Alpha-D-Tagatofuranose.svg
Alpha-D-Tagatopyranose.svg
Cysteinprotease Reaktionsmechanismus.svg
Alpha-D-Arabinofuranose.svg
Alpha-D-Arabinopyranose.svg
Alpha-D-Lyxofuranose.svg
Alpha-D-Lyxopyranose.svg
Alpha-D-Ribofuranose.svg
Alpha-D-Ribopyranose.svg
Alpha-D-Ribulofuranose.svg
Alpha-D-Xylulofuranose.svg
Alpha-D-Erythrofuranose.svg
Alpha-D-Threofuranose.svg
Alpha-Tropanol.svg
KinEnzymo(en).svg
AminoAcidball rus.svg
Catalisis enzimatica1.svg
Genetic code.svg
KinEnzymo(pl).svg
RHAU domain architecture 02.svg
Michaelis-Menten saturation curve of an enzyme reaction-es.svg
2-hydroxy-2-methylbutyric acid.svg
Mediterranean_Sea_political_map-mk.svg
Dallas County Texas Incorporated Areas.svg
LogTay.svg
USACPI1800.svg
BSicon KBHFa purple.svg
BSicon KBHFe jade.svg
BSicon KBHFe purple.svg
BSicon KBHFe denim.svg
Mediterranean_Sea_political_map-it.svg
Stem cell division and differentiation.svg
Logarithmic spiral.svg
ALAnumbering.svg
Dust_Storm_in_Rolla,_Kansas_05/06/35.jpg
Cpi-2010.svg
Mediterranean_Sea_political_map-en.svg
Mediterranean_Sea_political_map-fr.svg
PlotDiscriminantsOfQuarticFields.svg
Union Membership and Support.svg
Thyroid hormone synthesis-it.svg
Pendant drop test.svg
Example image.svg
Terms of Use   Search of the Day