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August 2022

A tetrapeptide is a peptide, classified as an oligopeptide, since it only consists of four amino acids joined by peptide bonds. Many tetrapeptides are pharmacologically active, often showing affinity and specificity for a variety of receptors in protein-protein signaling. Present in nature are both linear and cyclic tetrapeptides (CTPs), the latter

Calcitriol is the active form of vitamin D, normally made in the kidney. Plum LA, DeLuca HF (December 2010). "Vitamin D, disease and therapeutic opportunities". Nature Reviews. Drug Discovery. 9 (12): 941–955. doi:10.1038/nrd3318. PMID 21119732. S2CID 8894111. Encyclopedia of Endocrine Diseases. Academic Press. 2018. p. 344. ISBN 9780128122006.  "Office of Dietary Supplements - Vitamin D". ods.od.nih.gov. 9 October

Brain natriuretic peptide 32 (BNP), also known as B-type natriuretic peptide, is a hormone secreted by cardiomyocytes in the heart ventricles in response to stretching caused by increased ventricular blood volume. BNP is one of two natriuretic peptides "UniProt". www.uniprot.org. Retrieved 11 August 2022. The 32-amino acid polypeptide BNP is secreted attached to

Not to be confused with Somatocrinin or Somatomedin. Somatostatin, also known as growth hormone-inhibiting hormone (GHIH) or by several other names, is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G protein-coupled somatostatin receptors and inhibition of the release of numerous secondary hormones. Somatostatin inhibits insulin and glucagon secretion. "somatostatin".

Triiodothyronine, also known as T3, is a thyroid hormone. It affects almost every physiological process in the body, including growth and development, metabolism, body temperature, and heart rate.Bowen, R. (2010-07-24). "Physiologic Effects of Thyroid Hormones". Colorado State University. Retrieved 2013-09-29. Production of T3 and its prohormone thyroxine (T4) is activated by thyroid-stimulating hormone (TSH), which is released

Calcitonin is a 32 amino acid peptide hormone secreted by PARAFOLLICULAR CELLS (also known as C cells) of the thyroid (or endostyle) in humans and other chordates in the ultimopharyngeal body. It acts to reduce blood calcium (Ca2+), opposing the effects of PARATHYROID HORMONE (PTH). Its importance in humans has not been as well established

Corticotropin-like intermediate [lobe] peptide (CLIP), also known as adrenocorticotropic hormone fragment 18-39 (ACTH(18-39)), is a naturally occurring, endogenous neuropeptide with a docosapeptide structure and the amino acid sequence Arg-Pro-Val-Lys-Val-Tyr-Pro-Asn-Gly-Ala-Glu-Asp-Glu-Ser-Ala-Glu-Ala-Phe-Pro-Leu-Glu-Phe. CLIP is generated as a proteolyic cleavage product of adrenocorticotropic hormone (ACTH),Gianoulakis C, Seidah NG, Routhier R, Chrétien M (December 1979). "Biosynthesis and characterization of adrenocorticotropic hormone, alpha-melanocyte-stimulating hormone,

Melanin-concentrating hormone (MCH), also known as pro-melanin stimulating hormone (PMCH), is a cyclic 19-amino acid orexigenic hypothalamicpeptide originally isolated from the pituitary gland of teleost fish, where it controls skin pigmentation.Barson JR, Morganstern I, Leibowitz SF (2013). "Complementary roles of orexin and melanin-concentrating hormone in feeding behavior". International Journal of

Pro-opiomelanocortin (POMC) is a precursor polypeptide with 241 amino acid residues. POMC is synthesized in corticotrophs of the anterior pituitary from the 267-amino-acid-long polypeptide precursor pre-pro-opiomelanocortin (pre-POMC), by the removal of a 26-amino-acid-long signal peptide sequence during translation. "pro-opiomelanocortin preproprotein [Homo sapiens] - Protein - NCBI". www.ncbi.nlm.nih.gov. Retrieved 30 December 2020.POMC is part of the central melanocortin system. Function POMC is cut (cleaved)

Oxytocin (Oxt or OT) is a peptide hormone and neuropeptide normally produced in the hypothalamus and released by the posterior pituitary. Gray's Anatomy: The Anatomical Basis of Clinical Practice (41 ed.). Elsevier Health Sciences. 2015. p. 358. ISBN 978-0-7020-6851-5. It plays a role in social bonding, reproduction, childbirth, and the period after childbirth.Audunsdottir K, Quintana DS (2022-01-25). "Oxytocin's dynamic role across

Cholecystokinin ( CCK or CCK-PZ ; from Greek chole , "bile"; cysto , "sac"; kinin , "move"; hence, move the bile-sac ( gallbladder ) is a peptide hormone of the gastrointestinal system responsible for stimulating the digestion of fat and protein . Cholecystokinin, officially called pancreozymin , is synthesized and secreted by enteroendocrine cells in the duodenum , the first segment of the small intestine. Its presence causes the release of digestive enzymes and bile from the pancreas and gallbladder , respectively,

Ghrelin (or lenomorelin, INN) is a hormone produced by enteroendocrine cells of the gastrointestinal tract, especially the stomach, Kojima M, Hosoda H, Date Y, Nakazato M, Matsuo H, Kangawa K (December 1999). "Ghrelin is a growth-hormone-releasing acylated peptide from stomach". Nature. 402 (6762): 656–60. Bibcode:1999Natur.402..656K. doi:10.1038/45230. PMID 10604470. S2CID 753383. Müller TD, Nogueiras R, Andermann ML, Andrews ZB, Anker