Chains and heterogens:
PDB Chain Sequences:
>1if6A (A:) shhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslriln nghafnvefddsqdkavlkggpldgtyrliqfhfhwgsldgqgsehtvdkkkyaaelhlv hwntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdpr gllpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmv dnwrpaqplknrqikasfk
>1if6A (A:) hhwgygkhngpehwhkdfpiakgerqspvdidthtakydpslkplsvsydqatslrilnn ghafnvefddsqdkavlkggpldgtyrliqfhfhwgsldgqgsehtvdkkkyaaelhlvh wntkygdfgkavqqpdglavlgiflkvgsakpglqkvvdvldsiktkgksadftnfdprg llpesldywtypgslttppllecvtwivlkepisvsseqvlkfrklnfngegepeelmvd nwrpaqplknrqikasfk