by the criteria of solubility behavior in nacl solutions , elution from ( carboxymethyl ) cellulose ( cm-cellulose ) columns , sodium dodecyl sulfate ( nadodso4 ) -polyacrylamide gel electrophoresis , cnbr peptide pattern , and amino acid composition , the collagens of acidic and neutral solvent extracts and 1.5 m soluble fraction of pepsin extract were characterized as type i collagen and the 1.5 m nacl insoluble collagen as type iii .
C0009325
collagens
C0041455
1