id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-341265-esc55vwj	Qiu, Jingwen	Microbial enzymes catalyzing keratin degradation: Classification, structure, function	2020-08-05		.txt	text/plain	14837	810	49	For example, family M28 and M3 proteases secreted from the non-pathogenic fungus Onygena corvina have been reported to catalyze degradation of pig bristle keratin, and moreover to act synergistically with enzymes from the S8 family . The keratinolytic enzymes in the different families may play different roles in the keratin degrading process, due to differences in their active sites, the preferred substrate cleavage sites and recognition of amino acid length. The family S9 exo-keratinases may play a key role in attacking products from endo-protease hydrolyzed keratin protein (Lange et al., 2016; Mercer and Stewart, 2019) , but is not highly efficient in directly degrading keratin. To obtain amino acids from keratin-rich materials using keratinolytic enzymes, a preliminary degradation of disulfide bonds is necessary to loosen the keratin structure and make the amino acid chains available for keratinase attack (Gupta et al., 2013b; Peng et al., 2019) .	./cache/cord-341265-esc55vwj.txt	./txt/cord-341265-esc55vwj.txt