ID 4.2.3.1 DE threonine synthase. CA H2O + O-phospho-L-homoserine = L-threonine + phosphate. CC -!- Formerly EC 4.2.99.2. DR Q9S7B5, THRC1_ARATH; Q9SSP5, THRC2_ARATH; P09123, THRC_BACSL ; DR P04990, THRC_BACSU ; P57289, THRC_BUCAI ; Q8K9V1, THRC_BUCAP ; DR Q89AR5, THRC_BUCBP ; P23669, THRC_CORGL ; P00934, THRC_ECOLI ; DR Q00063, THRC_EREGS ; P44503, THRC_HAEIN ; Q9K7E3, THRC_HALH5 ; DR Q9ZMX5, THRC_HELPJ ; O24924, THRC_HELPY ; Q8TQD4, THRC_METAC ; DR P37145, THRC_METGL ; Q58860, THRC_METJA ; P66903, THRC_MYCBO ; DR P45837, THRC_MYCLE ; A0R220, THRC_MYCS2 ; P9WG58, THRC_MYCTO ; DR P9WG59, THRC_MYCTU ; P29363, THRC_PSEAE ; Q42598, THRC_SCHPO ; DR P27735, THRC_SERMA ; Q9MT28, THRC_SOLTU ; P74193, THRC_SYNY3 ; DR P16120, THRC_YEAST ; //