4.1.2.5	2-mercaptoethanol	activity is decreased to 20% of the original by treatment with cysteine plus mercaptoethanol. Most of the loss is regained on incubation with pyridoxal 5'-phosphate	63	
4.1.2.5	acetaldehyde	the enzymic cleavage of L-threonine stops when about 30% of the amino acid is converted to glycine and acetaldehyde. By dialysis of the incubation medium against buffer the full activity of the enzyme is restored, product inhibition	90	
4.1.2.5	Cu2+	-	19	
4.1.2.5	cysteine	activity is decreased to 20% of the original by treatment with cysteine plus mercaptoethanol. Most of the loss is regained on incubation with pyridoxal 5'-phosphate	153	
4.1.2.5	glycine	the enzymic cleavage of L-threonine stops when about 30% of the amino acid is converted to glycine and acetaldehyde. By dialysis of the incubation medium against buffer the full activity of the enzyme is restored, product inhibition	72	
4.1.2.5	Hg2+	-	33	
4.1.2.5	hydroxylamine	1 mM, complete inhibition	85	
4.1.2.5	p-chloromercuribenzoate	0.01 mM, complete inhibition	43	
4.1.2.5	Semicarbazide	1 mM, complete inhibition	382