In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.
Q: Appropriate sized transcripts were detected in both cultured and fresh peripheral lymphocytes for CYP11A , CYP17 , HSD11L ( 11beta - hydroxysteroid dehydrogenase I ) , HSD17B1 ( 17beta - hydroxysteroid dehydrogenase type I ) and SRD5A1 ( 5alpha - reductase I ) .
A:
5alpha - reductase