Chains and heterogens:
PDB Chain Sequences:
>1cal_ (-) hhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslrilnn ghafnvefddsqdkavlkggpldgtyrliqfhfhwgsldgqgsehtvdkkkyaaelhlvh wntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdprg llpesldywtypgslatppllecvtwivlkepisvsseqvlkfrklnfngegepeelmvd nwrpaqplknrqikasfk