Chains and heterogens:
PDB Chain Sequences:
>1f4lA (A:) mtqvakkilvtcalpyangsihlghmlehiqadvwvryqrmrghevnficaddahgtpim lkaqqlgitpeqmigemsqehqtdfagfnisydnyhsthseenrqlseliysrlkengfi knrtisqlydpekgmflpdrfvkgtcpkckspdqygdncevcgatyspteliepksvvsg atpvmrdsehfffdlpsfsemlqawtrsgalqeqvankmqewfesglqqwdisrdapyfg feipnapgkyfyvwldapigymgsfknlcdkrgdsvsfdeywkkdstaelyhfigkdivy fhslfwpamlegsnfrkpsnlfvhgyvtvngakmsksrgtfikastwlnhfdadslryyy taklssriddidlnledfvqrvnadivnkvvnlasrnagfinkrfdgvlaseladpqlyk tftdaaevigeawesrefgkavreimaladlanryvdeqapwvvakqegrdadlqaicsm ginlfrvlmtylkpvlpklteraeaflnteltwdgiqqpllghkvnpfkalynridmrqv ealveaskeev
>1f4lA (A:) akkilvtcalpyangsihlghmlehiqadvwvryqrmrghevnficaddahgtpimlkaq qlgitpeqmigemsqehqtdfagfnisydnyhsthseenrqlseliysrlkengfiknrt isqlydpekgmflpdrfvkgtcpkckspdqygdncevcgatyspteliepksvvsgatpv mrdsehfffdlpsfsemlqawtrsgalqeqvankmqewfesglqqwdisrdapyfgfeip napgkyfyvwldapigymgsfknlcdkrgdsvsfdeywkkdstaelyhfigkdivyfhsl fwpamlegsnfrkpsnlfvhgyvtvngakmsksrgtfikastwlnhfdadslryyytakl ssriddidlnledfvqrvnadivnkvvnlasrnagfinkrfdgvlaseladpqlyktftd aaevigeawesrefgkavreimaladlanryvdeqapwvvakqegrdadlqaicsmginl frvlmtylkpvlpklteraeaflnteltwdgiqqpllghkvnpfkalynridmrqvealv easke