important research topics. This study addresses the isolation of acid-soluble and pepsin-soluble forms
of collagen from dried jellyfish and squid, and their partial characterization. The properties of these
proteins have been studied and a comparison made of the protein patterns of collagen extracted from
marine organisms with those from other organisms, to determine which collagen subtypes are present,
and in what proportions. Pepsin-soluble collagen (PSC) from dried jellyfish and dried squid contained a
collagen form classified as type I, of molecular composition comparable with that of collagen type I
from rat tail. Peptide maps of collagens digested by achromopeptidase were slightly different,
indicating some differences in amino acid sequence or con