Chains and heterogens:
PDB Chain Sequences:
>4ptcA (A:) mhsshhhhhhssgenlyfqghmsgrprttsfaesckpvqqpsafgsmkvsrdkdgskvtt vvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfknrelq imrkldhcnivrlryffyssgekkdevylnlvldyvpetvyrvarhysrakqtlpviyvk lymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvsyics ryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgtptre qiremnpnytefkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleacahsf fdelrdpnvklpngrdtpalfnfttqelssnpplatilipphariqaaastptnataasd antgdrgqtnnaasasasnst
>4ptcA (A:) kvttvvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfkn relqimrkldhcnivrlryffyssdevylnlvldyvpetvyrvarhysrakqtlpviyvk lymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvsyics ryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgtptre qiremnpnytefkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleacahsf fdelrdpnvklpngrdtpalfnfttqelssnpplatilipph
>4ptcB (B:) mhsshhhhhhssgenlyfqghmsgrprttsfaesckpvqqpsafgsmkvsrdkdgskvtt vvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfknrelq imrkldhcnivrlryffyssgekkdevylnlvldyvpetvyrvarhysrakqtlpviyvk lymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvsyics ryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgtptre qiremnpnytefkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleacahsf fdelrdpnvklpngrdtpalfnfttqelssnpplatilipphariqaaastptnataasd antgdrgqtnnaasasasnst
>4ptcB (B:) skvttvvatpgqgpdrpqevsytdtkvigngsfgvvyqaklcdsgelvaikkvlqdkrfk nrelqimrkldhcnivrlryffyssdevylnlvldyvpetvyrvarhysrakqtlpviyv klymyqlfrslayihsfgichrdikpqnllldpdtavlklcdfgsakqlvrgepnvsyic sryyrapelifgatdytssidvwsagcvlaelllgqpifpgdsgvdqlveiikvlgtptr eqiremnpnytefkfpqikahpwtkvfrprtppeaialcsrlleytptarltpleacahs ffdelrdpnvklpngrdtpalfnfttqelssnpplatilipphariq