title: Hatching enzyme of the sea urchin Strongylocentrotus purpuratus.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D002364:Caseins; D004355:Drug Stability; D004625:Embryo, Nonmammalian / Q000201:enzymology*; D005306:Fertilization; D007700:Kinetics; D008274:Magnesium / Q000494:pharmacology; D008722:Methods; D008970:Molecular Weight; D010447:Peptide Hydrolases / Q000302:isolation & purification / Q000378:metabolism; D012617:Sea Urchins / Q000201:enzymology*; D013045:Species Specificity
chemical_list: D002364:Caseins; D010447:Peptide Hydrolases; D008274:Magnesium; D002118:Calcium