Table 1. Characteristics of RFLP-PCR primers, restriction endonucleases and product size.

Polymorphic positions	Primer sequence	Restriction enzyme	Product size (bp)
			Wild-type	Minore-type
TNF-а-863	5′ GGCTCTGAGGAATGGGTTAC 3′	BstBAI	125	102; 23
C→A	5′ CTACATGGCCCTGTCTTCGTTACG 3′
TNF-а-308	5′ AGGCAATAGGTTTTGAGGGCCAT 3′	Bsp19I	97; 20	118
G→A	5′ ACACTCCCCATCCTCCCGGCT 3′
TNF-а-238	5′ AGAAGACCCCCCTCGGAACC 3′	Msp I	132; 20	152
G→A	5′ ATCTGGAGGAAGCGGTAGTG 3′