RFLP profile of cytb gene. PCR amplicons were subjected to restriction digestion with Alu1 producing following restriction products: Lane 1: 100 bp DNA ladder, Lane 2: Cattle + Alu1 (64, 92, 453), Lane 3: Buffalo + Alu1 (92,517), Lane 4: Goat + Alu1 (609), Lane 5: Sheep + Alu1 (259,350), Lane 6: Pig + Alu1 (17, 27, 243, 322) and Lane 7: 100 bp DNA ladder