Delta sleep-inducing peptide (DSIP) is a naturally occurring nonapeptide — a chain of nine amino acids — with the sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu. It has a molecular weight of 848.81 g/mol and the formula C35H48N10O15 (CAS 62568-57-4). First isolated in 1977 from rabbit cerebral venous blood, DSIP is classified as amphiphilic, meaning it contains both water-attracting and water-repelling regions. The tryptophan residue at…
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GHRP-2 (pralmorelin) is a synthetic hexapeptide — a chain of six amino acids with the sequence D-Ala-D-2-Nal-Ala-Trp-D-Phe-Lys-NH2. It has a molecular formula of C45H55N9O6, a molecular weight of 817.99 g/mol, and a CAS number of 158861-67-7. The peptide incorporates two unnatural D-amino acids and the non-standard residue D-2-naphthylalanine, giving it a structure distinct from naturally occurring peptides. GHRP-2 was developed…
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GHRP-6 is a synthetic hexapeptide with the amino acid sequence His-D-Trp-Ala-Trp-D-Phe-Lys-NH2. Its molecular formula is C46H56N12O6, its molecular weight is 873.01 g/mol, and its CAS number is 87616-84-0. The peptide contains two D-amino acids (D-tryptophan and D-phenylalanine), which are mirror-image forms of their natural counterparts that increase the molecule’s resistance to enzymatic degradation. GHRP-6 was first synthesized in the 1980s,…
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