Xenopsin

The octapeptide Xenopsin (abbr. Xp) (QGKRPWIL; Gln-Gly-Lys-Arg-Pro-Trp-Ile-Leu) and xenopsin precursor fragment (abbr. XPF) (GWASKIGQTLGKIAKVGLKELIQPK; Gly-Trp-Ala-Ser-Lys-Ile-Gly-Gln-Thr-Leu-Gly-Lys-Ile-Ala-Lys-Val-Gly-Leu-Lys-Glu-Leu-Ile-Gln-Pro-Lys) are bioactive peptides derived from a single precursor molecule. The precursor protein contains the biologically active peptide at the carboxy-terminus (Sures and Crippa, 1984), and processing may give rise to additional bioactive proteins (Gibson et al, 1986).

In older references the term Xenopsin-related peptide-1 (abbr. XP-1 ... ... ... ...
 
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Entry last modified: December 2006