Chains and heterogens:
PDB Chain Sequences:
>1k9yA (A:) alerellvatqavrkaslltkriqsevishkdsttitkndnspvttgdyaaqtiiinaik snfpddkvvgeesssglsdafvsgilneikandevynknykkddflftndqfplksledv rqiidfgnyeggrkgrfwcldpidgtkgflrgeqfavclalivdgvvqlgcigcpnlvls sygaqdlkghesfgyifravrglgafyspssdaeswtkihvrhlkdtkdmitlegvekgh sshdeqtaiknklniskslhldsqakycllalgladvylrlpiklsyqekiwdhaagnvi vheaggihtdamedvpldfgngrtlatkgviassgprelhdlvvstscdviqsr