SMN2 GI:13259529 survival of motor neuron 2, centromeric isoform b 1 mamssggsgg gvpeqedsvl frrgtgqsdd sdiwddtali kaydkavasf 50 51 khalkngdic etsgkpkttp krkpakknks qkkntaaslq qwkvgdkcsa 100 101 iwsedgciyp atiasidfkr etcvvvytgy gnreeqnlsd llspicevan 150 151 nieqnaqene nesqvstdes ensrspgnks dnikpksapw nsflpppppm 200 201 pgprlgpgki ipppppicpd slddadalgs mliswymsgy htgyymgfrq 250 251 nqkegrcshs ln