Chains and heterogens:
PDB Chain Sequences:
>4pfnA (A:) mfnnepleqidkelhdiladeekrqretinliasenltngavreclgnrvsnkysegypk kryyggndfidkieelcqkraleafnvsdeewgvnvqplsgsaanvqalyalvgvkgkim gmhlcsgghlthgffdekkkvsitsdmfesklykcnsqgyvdldavremalsfkpkviic gytsyprdidyqqfrqicdevnaylfadishissfvacnilnnpflhadvvtttthkilr gprsaliffnkkrnpgieqkinsavfpsfqggphnnkiaavacqlkevhspafkeytqqv llnskalakaliskqidlvtngtdnhlivvdlrkfsitgsklqetcnainvslnkntips dvdcvspsgvrigtpamttrgakekdmefiadvlaraikitvdlqeqygkklvdfkkglp gnaqlqqlkqevvtwagalpfp
>4pfnB (B:) mfnnepleqidkelhdiladeekrqretinliasenltngavreclgnrvsnkysegypk kryyggndfidkieelcqkraleafnvsdeewgvnvqplsgsaanvqalyalvgvkgkim gmhlcsgghlthgffdekkkvsitsdmfesklykcnsqgyvdldavremalsfkpkviic gytsyprdidyqqfrqicdevnaylfadishissfvacnilnnpflhadvvtttthkilr gprsaliffnkkrnpgieqkinsavfpsfqggphnnkiaavacqlkevhspafkeytqqv llnskalakaliskqidlvtngtdnhlivvdlrkfsitgsklqetcnainvslnkntips dvdcvspsgvrigtpamttrgakekdmefiadvlaraikitvdlqeqygkklvdfkkglp gnaqlqqlkqevvtwagalpfp
>4pfnC (C:) mfnnepleqidkelhdiladeekrqretinliasenltngavreclgnrvsnkysegypk kryyggndfidkieelcqkraleafnvsdeewgvnvqplsgsaanvqalyalvgvkgkim gmhlcsgghlthgffdekkkvsitsdmfesklykcnsqgyvdldavremalsfkpkviic gytsyprdidyqqfrqicdevnaylfadishissfvacnilnnpflhadvvtttthkilr gprsaliffnkkrnpgieqkinsavfpsfqggphnnkiaavacqlkevhspafkeytqqv llnskalakaliskqidlvtngtdnhlivvdlrkfsitgsklqetcnainvslnkntips dvdcvspsgvrigtpamttrgakekdmefiadvlaraikitvdlqeqygkklvdfkkglp gnaqlqqlkqevvtwagalpfp