Chains and heterogens:
PDB Chain Sequences:
>3fxpA (A:) itgtstvgvgrgvlgdqkninttystyyylqdntrgngiftydakyrttlpgslwadadn qffasydapavdahyyagvtydyyknvhnrlsydgnnaairssvhysqgynnafwngsqm vygdgdgqtfiplsggidvvahelthavtdytagliyqnesgaineaisdifgtlvefya nknpdweigedvytpgisgdslrsmsdpakygdpdhyskrytgtqdnggvhinsgiinka aylisqggthygvsvvgigrdklgkifyraltqyltptsnfsqlraaavqsatdlygsts qevasvkqafdavgvk