Transcription factor coded by a gene on the Y chromosome that initiates development of the male sex organs (i.e., testicular differentiation) in the embryo.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 804 (https://doi.org/10.1515/pac-2015-1202)