Expression of Mfn2 , Mns1 , and Gapdh in somatic and reproductive tissues as detected by RT-PCR. Mfn2 was transcribed in brain and testis while Mns1 was expressed in the testis. Both genes were expressed in spermatogenic cells. Br: brain, Hr: heart, Ln: lung, Tr: trachea, Kd: kidney, Lv: liver, Sp: spleen, Sk: skeletal muscle, T: testis, Ov: ovary, Od: oviduct, Ut: uterus, PS: pachytene spermatocytes, RS: round spermatids, CS: condensing spermatids. Amplicon size for Mfn2, Mns1, Gapdh was 109, 147, and 132 base pairs (bp), respectively.