title: Determination of in vivo alterations in a phenotype of human spermatozoa.
mesh_terms: D000704:Analysis of Variance; D004156:Catechol Oxidase / Q000378:metabolism*; D004295:Dihydroxyphenylalanine / Q000378:metabolism; D005615:Freezing; D006651:Histocytochemistry; D006801:Humans; D008297:Male; D008543:Melanins / Q000096:biosynthesis; D010641:Phenotype; D013053:Spectrophotometry; D013094:Spermatozoa / Q000201:enzymology*
chemical_list: D008543:Melanins; D004295:Dihydroxyphenylalanine; D004156:Catechol Oxidase