UDP-N-ACETYLHEXOSAMINE PYROPHOSPHORYLASE (ANTIGEN X) (AGX) (SPERM- ASSOCIATED ANTIGEN 2) [INCLUDES: UDP-N-ACETYLGALACTOSAMINE PYROPHOSPHORYLASE (EC 2.7.7.-) (AGX-1); UDP-N-ACETYLGLUCOSAMINE PYROPHOSPHORYLASE (EC 2.7.7.23) (AGX-2)]. [Source:SWISSPROT;Acc:Q16222]