Chains and heterogens:
PDB Chain Sequences:
>1hxxA (A:) aeiynkdgnkvdlygkavglhyfskgngensyggngdmtyarlgfkgetqinsdltgygq weynfqgnnsegadaqtgnktrlafaglkyadvgsfdygrnygvvfdalgytdmlpefgg dtaysddffvgrvggvatyrnsnffglvdglnfavqylgknerdtarrsngdgvggsisy eyegfgivgaygaadrtnlqeaqplgngkkaeqwatglkydanniylaanygetrnatpi tnkftntsgfanktqdvllvaqyqfdfglrpsiaytkskakdvegigdvdlvnyfevgat yyfnknmstyvdyiinqidsdnklgvgsddtvavgivyqf