Chains and heterogens:
PDB Chain Sequences:
>7tlnA (A:) itgtstvgvgrgvlgdqkninttystyyylqdntrgdgiftydakyrttlpgslwadadn qffasydapavdahyyagvtydyyknvhnrlsydgnnaairssvhysqgynnafwngsem vygdgdgqtfiplsggidvvahelthavtdytagliyqnesgaineaisdifgtlvefya nknpdweigedvytpgisgdslrsmsdpakygdpdhyskrytgtqdnggvhinsgiinka aylisqggthygvsvvgigrdklgkifyraltqyltptsnfsqlraaavqsatdlygsts qevasvkqafdavgvk