The compositions and some properties of acid-soluble collagens (ASC) of the skin and bone of bigeye snapper, (Priacanthus
tayenus) were investigated. The collagens were extracted with the yields of 10.94% and 1.59% on the basis of wet weight, from skin
and bone, respectively. Similar electrophoretic patterns of collagens from the skin and bone were observed. Both collagens comprised
two different a chains, a1 and a2 and were classified as type I collagen. However, peptide maps of collagen from the skin and
bone of bigeye snapper, digested by V8 protease and lysyl endopeptidase, revealed differences between collagens from skin and bone,
and both were completely different from those of calf skin collagen. Collagen rehydrated in acetic acid had lower Tmax and enthalpy
than those rehydrated in deionised water, suggesting a conformational change caused by acid. Collagens form the skin and bone had
the highest solubility at pH 2 and 5, respectively. No changes in solubility were observed in the presence of NaCl up to 3% (w/v).
However, a sharp decrease in solubility was found with NaCl above 3% (w/v).
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