Peptide Collection

DNA transcription, molecular model. Secondary structure of the enzyme RNA polymerase II synthesising a mRNA (messenger ribonucleic acid, lilac) strand from a DNA (deoxyribonucleic acid)

Myoglobin molecule C015 / 5702
Myoglobin molecule. Computer model showing the structure of a myoglobin molecule. Myoglobin is a protein found in muscle tissue

Illustration of gastric glands secreting pepsin to break down protein in stomach into digestible peptides

Illustration showing how enzymes flow through human pancreatic duct into duodenum of small intestine, breaking down peptides into amino acids

Sirtuin enzyme and p53, artwork C017 / 3659
Sirtuin enzyme and p53. Computer artwork of a sirtuin (Sir2) enzyme (pink) bound to a p53 peptide (orange). Sir2 enzymes form a unique class of NAD(+)

Sirtuin enzyme and p53, artwork C017 / 3658
Sirtuin enzyme and p53. Computer artwork of a sirtuin (Sir2) enzyme (pink) bound to a p53 peptide (orange). Sir2 enzymes form a unique class of NAD(+)

Insulin A chain molecule
Insulin A chain. Computer model of an A chain of human insulin that has been synthesized on a crosslinked polystyrene solid support. This is an example of solid phase peptide synthesis (SPPS)

Transfer RNA-synthetase complex molecule. Molecular model of a human tryptophanyl-tRNA synthetase molecule (red) complexed with a tRNA(Trp) molecule (blue)

Iron containing protein, molecular model
Iron containing protein. Molecular model showing the structure of a bacterial homolog of the animal iron containing protein ferritin

Sirtuin enzyme and p53, artwork C017 / 3660
Sirtuin enzyme and p53. Computer artwork of a sirtuin (Sir2) enzyme (blue) bound to a p53 peptide (pink). Sir2 enzymes form a unique class of NAD(+)

Insulin molecule F006 / 9761
Insulin molecule. Molecular model of the hormone insulin from a pig. Insulin consists of two peptide chains, A and B, which are linked by disulphide bridges

Glycosylation enzyme molecule F006 / 9708
Glycosylation enzyme. Molecular model of the enzyme N-acetylglucosamine (GlcNAc) transferase. This intracellular enzyme adds N-acetylglucosamine molecules to target proteins

Insulin molecule F006 / 9625
Insulin, molecular model. Insulin plays an important role in blood sugar regulation. It is released from the pancreas when blood sugar levels are high, for example after a meal

Insulin molecule F006 / 9605
Insulin molecule. Molecular model of the hormone insulin. Insulin consists of two peptide chains, A and B, which are linked by disulphide bridges

MHC protein complexed with flu virus F006 / 9294
MHC protein complexed with flu virus. Molecular model showing human class II MHC (major histocompatibility complex) protein HLA-DR1 complexed with an influenza (flu) virus peptide

Synthetic triple helical peptide molecule F006 / 9275
Synthetic triple helical peptide, molecular model

cAMP-dependent protein kinase molecule F006 / 9240
cAMP-dependent protein kinase. Molecular model of cAMP-dependent protein kinase complexed with a peptide inhibitor and ATP (adenosine triphosphate)

Myoglobin protein, molecular model C016 / 6575
Myoglobin protein. Molecular model showing the structure of the myoglobin protein. Myoglobin is a protein found in muscle tissue

MHC protein-antigen complex C015 / 1924
MHC protein-antigen complex. Molecular model of the human class I MHC (major histocompatibility complex) protein HLA-D27 complexed with a peptide antigen

Beta-amyloid peptide molecule, artwork C014 / 2657
Molecular ribbon representation of the beta-amyloid peptide. The amyloid fibrillar form is the primary component of amyloid plaques found in the brains of Alzheimers disease patients

Neuropeptide Y neurotransmitter molecule C015 / 6240
Neuropeptide Y neurotransmitter molecule. Molecular model showing the structure of the neurotransmitter neuropeptide Y (NPY). NPY is found in the brain and autonomic nervous system

Myoglobin molecule C015 / 5701
Myoglobin molecule. Computer model showing the structure of a myoglobin molecule. Myoglobin is a protein found in muscle tissue

Myoglobin molecule C015 / 5164
Myoglobin molecule. Computer model showing the structure of a myoglobin molecule. Myoglobin is a protein found in muscle tissue

Multiple sclerosis protein complex C015 / 3496
Multiple sclerosis protein complex, molecular model. The proteins forming this complex are a T-cell receptor (TCR), a peptide antigen (myelin basic protein, MBP)

Multiple sclerosis protein complex, molecular model. The proteins forming this complex are a T-cell receptor (TCR), a peptide antigen (myelin basic protein, MBP)

Neuropeptide Y neurotransmitter molecule C014 / 0013
Neuropeptide Y neurotransmitter molecule. Molecular model showing the structure of the neurotransmitter neuropeptide Y (NPY)

Birch pollen allergen molecule C013 / 8889
Birch pollen allergen molecule. Computer model showing the secondary structure of a Bet v 1L molecule. This molecule is responsible for allergic reactions to pollen from birch (Betula sp.) trees

Glycated haemoglobin molecule C013 / 7781
Glycated haemoglobin molecule. Computer model of a glycated haemoglobin molecule. The alpha and beta subunits of the haemoglobin are blue and pink, and the iron-containing haem groups are grey

Glycated haemoglobin molecule C013 / 7779
Glycated haemoglobin molecule. Computer model showing a glucose molecule (centre) bound to a molecule of haemoglobin. The alpha and beta subunits of the haemoglobin are blue and pink

Glycated haemoglobin molecule C013 / 7780
Glycated haemoglobin molecule. Computer model showing a glucose molecule (centre) bound to a molecule of haemoglobin. The alpha and beta subunits of the haemoglobin are blue and pink

Cone snail venom component molecule
Contryphan-R, molecular model. This peptide is an active component of the venom produced by the sea snail Conus radiatus. Atoms are represented as spheres and rods and are colour-coded

Antibiotic cell membrane effect, artwork
Antibiotic cell membrane effect. Artwork of the natural antibiotic peptide defensin (orange) disrupting the cell membrane of a bacterium (top right)

Alpha-endorphin, molecular model
Alpha-endorphin hormone, molecular model. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (white), oxygen (red), nitrogen (blue) and sulphur (yellow)

Haemoglobin molecule, artwork
Haemoglobin molecule. Computer artwork showing the molecular structure of haemoglobin, a metalloprotein that transports oxygen around the body in red blood cells

Myoglobin molecule. Computer model showing the structure of a Myoglobin molecule. Myoglobin is a protein found in muscle tissue

Hantavirus inhibitor molecule. Molecular model of a pentapeptide protein that blocks the entry of hantavirus particles to human cells

Enkephalin crystals, light micrograph
Enkephalin crystals, polarised light micrograph. Enkephalin is an endorphin found in the human brain. There are two variants: Met-enkephalin (seen here), which contains the amino acid methionine

Insulin-like growth 1 factor molecule
Insulin-like growth factor 1 molecule. Computer model showing the structure of a molecule of the hormone insulin-like growth factor 1 (IGF-1)

Thyroid-stimulating hormone molecule. Computer model showing the structure of a molecule of thyroid stimulating hormone (TSH)

Atrial natriuretic peptide molecule. Computer model showing the structure of a molecule of the hormone atrial natriuretic peptide (ANP)

Prolactin hormone molecule. Computer model showing the secondary structure of human prolactin (hPRL), or luteotropic hormone (LTH)

Insulin-like growth 2 factor molecule
Insulin-like growth factor 2 molecule. Computer model showing the structure of a molecule of the hormone insulin-like growth factor 2 (IGF-2)

Thrombopoietin hormone molecule. Computer model showing the secondary structure of a molecule of the hormone thrombopoietin (TPO)

Renin and inhibitor complex. Computer model showing the secondary structure of the enzyme renin complexed with inhibitor 7

Relaxin hormone molecule. Computer model showing the secondary structure of a molecule of the hormone relaxin. The alpha helices (ribbons) of the secondary structure can be seen

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Peptides: Unveiling the Intricate World of Molecular Marvels DNA transcription and molecular model: Unlocking the secrets of life, DNA transcription orchestrates the synthesis of peptides, paving the way for countless biological wonders. Cone snail venom component molecule: Within the venomous embrace of a cone snail lies a tiny peptide molecule, holding immense potential for medical breakthroughs and pain management. Enkephalin crystals, light micrograph: Intricately arranged enkephalin crystals under microscopic scrutiny reveal nature's elegant design in these endogenous opioids that modulate our perception of pain. Gastric glands secreting pepsin illustration: Witness the fascinating process as gastric glands secrete pepsin to break down proteins into digestible peptides within our stomachs, fueling our bodies with vital nutrients. Pancreatic enzymes breaking down peptides illustration: Embark on a journey through human pancreatic ducts as enzymes diligently break down complex peptides into essential amino acids within the duodenum of our small intestine. Sirtuin enzyme and p53 artwork C017 / 3659: Marvel at this artistic representation showcasing the intricate dance between sirtuin enzyme and p53 protein, unraveling their role in cellular regulation and longevity. Insulin A chain molecule: Behold the elegance encapsulated within an insulin A chain molecule—a key player in regulating glucose metabolism—unleashing its power to maintain balance within our bodies. Transfer RNA-synthetase complex molecule: Delve into the realm where transfer RNA-synthetase complex molecules flawlessly match specific amino acids to their corresponding codons during protein synthesis—an exquisite feat of precision. Iron-containing protein molecular model: Discover how iron-containing proteins intricately bind this essential element, enabling crucial functions like oxygen transport or electron transfer throughout living organisms' systems.