Chains and heterogens:
PDB Chain Sequences:
>1b80A (A:) viekratcsngktvgdasccawfdvlddiqqnlfhggqcgaeahesirlvfhdsiaispa meaqgkfggggadgsimifddietafhpnigldeivklqkpfvqkhgvtpgdfiafagav alsncpgapqmnfftgrapatqpapdglvpepfhtvdqiinrvndagefdelelvwmlsa hsvaavndvdptvqglpfdstpgifdsqffvetqlrgtafpgsggnqgevesplpgeiri qsdhtiardsrtacewqsfvnnqsklvddfqfiflaltqlgqdpnamtdcsdvipqskpi pgnlpfsffpagktikdveqacaetpfptlttlpgpetsvqrippppga
>1b80B (B:) ratcsngktvgdasccawfdvlddiqqnlfhggqcgaeahesirlvfhdsiaispameaq gkfggggadgsimifddietafhpnigldeivklqkpfvqkhgvtpgdfiafagavalsn cpgapqmnfftgrapatqpapdglvpepfhtvdqiinrvndagefdelelvwmlsahsva avndvdptvqglpfdstpgifdsqffvetqlrgtafpgsggnqgevesplpgeiriqsdh tiardsrtacewqsfvnnqsklvddfqfiflaltqlgqdpnamtdcsdvipqskpipgnl pfsffpagktikdveqacaetpfptlttlpgpetsvqrippppga