Rooster Collagen Extracts from Rooster by-Products

Collagen associated hydrolysates have desirable characteristics for various industrial applications [1,2]. They have been used as important biomaterial in medical applications because of their biodegradability and weak antigenicity [3]. In addition, intracellular and extra-cellular self-assembly of polypeptide chains and the cross-links between adjacent molecules help collagen fibrils to withstand physical stress [4]. Collagen is also effective in decreasing cooking loss of deli products containing chunked chicken meat by increasing protein-protein bindings, and has the potential to improve the quality characteristics of deli rolls by improving their texture [5]. Further, Mittal [6] showed that collagen hydrolysates can be used as binders or extenders in meat emulsions. Moreover, collagen can also be used to make natural casings for sausages and frankfurters [7] and to fill periodontal bony pockets [8]. Collagen is however, deficient in the essential amino acid tryptophan and limited in some essential amino acids such as lysine, threonine and methionine [9].