アイソザイムアイソザイムMeanings1nounisozyme; isoenzymeBiochemistry term for enzymes that differ in amino acid sequence but catalyze the same reaction.乳にゅう酸さん脱だっ水すい素そ酵こう素そには複ふく数すうのアイソザイムが存そん在ざいする。Lactate dehydrogenase has multiple isozymes.