4.1.2.8	(1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate = indole + D-glyceraldehyde 3-phosphate	-	-	
4.1.2.8	(1S,2R)-1-C-(indol-3-yl)glycerol 3-phosphate = indole + D-glyceraldehyde 3-phosphate	the indole is further converted to 2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one, a secondary plant metabolite. BX1 cleaves indole-3-glycerol phosphate significantly faster to indole and glyceraldehyde 3-phosphate than the homologous alpha-subunit of tryptophan synthase, EC 4.2.1.20. In the primary metabolism, indole diffuses through the connecting tunnel to the beta-active site where it is condensed with serine to form tryptophan and water	666055