protein sulfotransferase 1A3 protein ST1A3 aryl sulfotransferase 1A3 HAST3 PR:000028975 SULT1A3 thermolabile phenol sulfotransferase A protein that is a translation product of the human SULT1A3 gene or a 1:1 ortholog thereof. STM catecholamine-sulfating phenol sulfotransferase monoamine-sulfating phenol sulfotransferase sulfotransferase, monoamine-preferring placental estrogen sulfotransferase Category=gene. TL-PST M-PST