Chains and heterogens:
PDB Chain Sequences:
>4k68A (A:) msisrrlflrnaalsaallsikgqaiakaaertgikdfykddfrigtavatatltmkekk pllaliarefnaitpencmkweplkpqdkdwhweaadkfvefgekhkmyivghnlvwhsq vpkevflnesggtiskealtakmqdhiatlagrykgriqawdvvneaveddgswrkspwy nimgedfiakaftmahevdpkahliyndyntespikrnfivgmiknfkkqgvpihgvgmq ehlaidgpsvdeiektlialadagvrahiteldidvlpsvwnlptaevstrfeykperdp yiqglpkdmeeklakryedifkiylkhrdkiervtlwgtadnetwlndfpikgrtnypll fdrnqkpkpayfrlldlkk
>4k68A (A:) rtgikdfykddfrigtavatatltmkekkpllaliarefnaitpencmkweplkpqdkdw hweaadkfvefgekhkmyivghnlvwhsqvpkevflnesggtiskealtakmqdhiatla grykgriqawdvvneaveddgswrkspwynimgedfiakaftmahevdpkahliyndynt espikrnfivgmiknfkkqgvpihgvgmqehlaidgpsvdeiektlialadagvrahite ldidvlpsvfeykperdpyiqglpkdmeeklakryedifkiylkhrdkiervtlwgtadn etwlndfpikgrtnypllfdrnqkpkpayfrlldlkk
>4k68B (B:) msisrrlflrnaalsaallsikgqaiakaaertgikdfykddfrigtavatatltmkekk pllaliarefnaitpencmkweplkpqdkdwhweaadkfvefgekhkmyivghnlvwhsq vpkevflnesggtiskealtakmqdhiatlagrykgriqawdvvneaveddgswrkspwy nimgedfiakaftmahevdpkahliyndyntespikrnfivgmiknfkkqgvpihgvgmq ehlaidgpsvdeiektlialadagvrahiteldidvlpsvwnlptaevstrfeykperdp yiqglpkdmeeklakryedifkiylkhrdkiervtlwgtadnetwlndfpikgrtnypll fdrnqkpkpayfrlldlkk
>4k68B (B:) gikdfykddfrigtavatatltmkekkpllaliarefnaitpencmkweplkpqdkdwhw eaadkfvefgekhkmyivghnlvwhsqvpkevflnesggtiskealtakmqdhiatlagr ykgriqawdvvneaveddgswrkspwynimgedfiakaftmahevdpkahliyndyntes pikrnfivgmiknfkkqgvpihgvgmqehlaidgpsvdeiektlialadagvrahiteld idvlpsvwnlptaevstrfeykperdpyiqglpkdmeeklakryedifkiylkhrdkier vtlwgtadnetwlndfpikgrtnypllfdrnqkpkpayfrlldlk