isoaspartyl peptidase/L-asparaginase ALP L-asparagine amidohydrolase CRASH L-asparaginase beta-aspartyl-peptidase asparaginase like 1 ALP1 asparaginase-like 1 protein asparaginase-like protein 1 isoaspartyl dipeptidase testis secretory sperm-binding protein Li 242mP