Chains and heterogens:
PDB Chain Sequences:
>1kr1A (A:) ggiaiywgqngnegtltqtcstrkysyvniaflnkfgngqtpqinlaghcnpaaggctiv sngirscqiqgikvmlslgggigsytlasqadaknvadylwnnflggksssrplgdavld gidfaiahgstlywddlarylsayskqgkkvyltaapqcpfpdrylgtalntglfdyvwv qfynnppcqyssgninniinswnrwttsinagkiflglpaapeaagsgyvppdvlisril peikkspkyggvmlwskfyddkngysssildsv