hydrophobicehydrophobic interactions increased,
resulting in protein precipitation and aggregation Collagen from various fish scraps have been shown to
exhibit different pI values. For example, the pI value of collagen
from striped catfish skin is 4.27 collagen from spotted golden goatfish scales has a pI of 4.96 and the pI of bamboo shark skin collagen is 6.12 Collagen pI values may differ due to various amino
acid sequences and distribution of amino acid residues.