. Author manuscript; available in PMC: 2021 Aug 23.

Published in final edited form as: Med Sci Sports Exerc. 2012 May;44(5):818–826. doi: 10.1249/MSS.0b013e31823bfcbf

TABLE 1.

Expression of 5α-reductase isozymes within select androgen-responsive tissues.

Tissue	Species	Type 1 Isozyme	Type 2 Isozyme	Type 3 Isozyme
Skeletal muscle	Human	+	−	+
	Rat	+	+	Unknown
Cardiac muscle	Human	Unknown	−	Unknown
Prostate	Human	−	+	+

+, Expressed; −, not expressed (9,21,32,64).