3.4.21.99	gonad	-	
3.4.21.99	additional information	no activity detected in hepatopancreas, intestine and brachial basket	
3.4.21.99	spermatozoon	-	
3.4.21.99	spermatozoon	expressed just before and during spawing season, localized on the sperm head and released into the surrounding seawater in response to the sperm reaction which occurs after the sperm binding to the vitelline coat	
3.4.21.99	spermatozoon	head region. Partially released from sperm in response to sperm activation or sperm reaction. The enzyme is expressed in the gonad from about half a month before and during the spawning season