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α-Amanitin Bacitracin Ciclosporin. Cyclic peptides are polypeptide chains which contain a circular sequence of bonds. [1] This can be through a connection between the amino and carboxyl ends of the peptide, for example in cyclosporin; a connection between the amino end and a side chain, for example in bacitracin; the carboxyl end and a side chain, for example in colistin; or two side chains ...
The stunting effect of kalata B1 cyclic peptide on growth and development of Helicoverpa punctigera, a caterpillar from the Lepidopteran order. [6]Cyclotides have been reported to have a wide range of biological activities, including anti-HIV, insecticidal, anti-tumour, antifouling, anti-microbial, hemolytic, neurotensin antagonism, trypsin inhibition, and uterotonic activities.
These drugs block activation of the integrin responsible for aggregation of platelets (αIIbβ3, also known as glycoprotein IIb/IIIa) in response to the blood glycoproteins fibrinogen and von Willebrand factor. Eptifibatide (marketed as Integrilin) is a cyclic (circular) seven amino acid peptide, whereas tirofiban is a small molecule designed ...
α-Amanitin (alpha-Amanitin) is a cyclic peptide of eight amino acids.It is possibly the most deadly of all the amatoxins, toxins found in several species of the mushroom genus Amanita, one being the death cap (Amanita phalloides) as well as the destroying angel, a complex of similar species, principally A. virosa and A. bisporigera.
[3] Circular peptides tend to be resistant to protease activity, and may be suitable for use as orally administered drugs. Once a cyclic peptide is identified with a biological activity of interest, it may also be possible to identify the target of the peptide (a gene that encodes a protein with which it interacts) by functional complementation ...
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Novo Nordisk scientist Lotte Bjerre Knudsen paved the way for popular GLP-1 drugs like Ozempic. Her work in the 1990s was instrumental in turning short-acting hormones into long-acting drugs.
DKP's are the smallest known class of cyclic peptide. [1] Despite their name, they are not ketones, but amides. Three regioisomers are possible, differing in the locations of the carbonyl groups. Retosiban [2] is a diketopiperazine being investigated as an oral drug. One isomer is an oxamide obtained from ethylenediamine.