3-oxo-5alpha-steroid 4-dehydrogenase (acceptor); steroid 5alpha-reductase; 3-oxosteroid Delta4-dehydrogenase; 3-oxo-5alpha-steroid Delta4-dehydrogenase; steroid Delta4-5alpha-reductase; Delta4-3-keto steroid 5alpha-reductase; Delta4-3-oxo steroid re • • •