ID   4.2.1.22
DE   Cystathionine beta-synthase.
AN   Beta-thionase.
AN   Methylcysteine synthase.
AN   Serine sulfhydrase.
CA   L-serine + L-homocysteine = L-cystathionine + H(2)O.
CF   Pyridoxal 5'-phosphate.
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.
PR   PROSITE; PDOC00700;
DR   P0DN79, CBSL_HUMAN ;  P46794, CBS_DICDI  ;  P35520, CBS_HUMAN  ;
DR   Q58H57, CBS_MACFA  ;  Q91WT9, CBS_MOUSE  ;  Q9N0V7, CBS_RABIT  ;
DR   P32232, CBS_RAT    ;  P32582, CBS_YEAST  ;  Q9YBL2, CYSO_AERPE ;
DR   P9WP50, Y1077_MYCTO;  P9WP51, Y1077_MYCTU;
//