ID   4.2.1.22
DE   cystathionine beta-synthase.
AN   beta-thionase.
AN   methylcysteine synthase.
AN   serine sulfhydrase.
CA   L-homocysteine + L-serine = L,L-cystathionine + H2O.
CC   -!- A multifunctional enzyme: catalyzes beta-replacement reaction between
CC       L-serine, L-cysteine, cysteine thioethers or some other beta-
CC       substituted alpha-L-amino acids and a variety of mercaptans.
CC   -!- Formerly EC 4.2.1.21.
DR   G5EFH8, CBS1_CAEEL ;  Q9N4K2, CBS2_CAEEL ;  Q2V0C9, CBS_APIME  ;
DR   P46794, CBS_DICDI  ;  P35520, CBS_HUMAN  ;  Q58H57, CBS_MACFA  ;
DR   Q91WT9, CBS_MOUSE  ;  Q9N0V7, CBS_RABIT  ;  P32232, CBS_RAT    ;
DR   P32582, CBS_YEAST  ;  Q9YBL2, CYSO_AERPE ;  P9WP50, Y1077_MYCTO;
DR   P9WP51, Y1077_MYCTU;
//