Table 1.

Primer sequences of studied genes.

Gene	SNP	Primers	Product (bp)
MTR	A2756G (rs1805087)	(F): 5'-TGTTCCAGACAGTTAGATGAAAATC-3'	211
		(R): 5'-GATCCAAAGCCTTTTACACTCCTC-3'.
MTHFR	C677T (rs1801133)	(F): 5′- TGAAGGAGAAGGTGTCTGCGGGA-3′	198
		(R): 5′-AGGACGGTGCGGTGAGAGTG -3′
	A1289C (rs1801131)	(F): 5′-AAGGAGGAGCTGCTGAAGATG-3′	237
		(R): 5′-CTTTGCCATGTCCACAGCATG-3′.

MTR: Methonine synthase, MTHFR: 5,10 Methylenetetrahydrofolate reductase, SNP: single nucleotide polymorphism.