@book{21144,
	author = {Handbook of proteolytic enzymes : aspartic and metallopeptidases and Barrett, Alan J., ed.},
	title = {Handbook of proteolytic enzymes : aspartic and metallopeptidases (Vol 1)},
	publisher = {Elsevier},
	year = {2004},
	address = {Amsterdam},
	edition = {2nd ed.}
}