Chains and heterogens:
PDB Chain Sequences:
>2crkA (A:) mpfgnthnkyklnykseeeypdlskhnnhmakvltpdlykklrdketpsgftlddviqtg vdnpghpfimtvgcvagdeesytvfkdlfdpiiqdrhggfkptdkhktdlnhenlkggdd ldphyvlssrvrtgrsikgytlpphcsrgerraveklsvealnsltgefkgkyyplksmt eqeqqqliddhflfdkpvsplllasgmardwpdargiwhndnksflvwvneedhlrvism ekggnmkevfrrfcvglqkieeifkkaghpfmwnehlgyvltcpsnlgtglrggvhvkla hlskhpkfeeiltrlrlqkrgtsvfdtaavgsvfdisnadrlgsseveqvqlvvdgvklm vemekklekgqsiddmipaqk
>2crkA (A:) nkyklnykseeeypdlskhnnhmakvltpdlykklrdketpsgftlddviqtgvdnpghp fimtvgcvagdeesytvfkdlfdpiiqdrhggfkptdkhktdlnhenlkggddldphyvl ssrvrtgrsikgytlpphcsrgerraveklsvealnsltgefkgkyyplksmteqeqqql iddhflfdkpvsplllasgmardwpdargiwhndnksflvwvneedhlrvismekggnmk evfrrfcvglqkieeifkkaghpfmwnehlgyvltcpsnlgtglrggvhvklahlskhpk feeiltrlrlqkrgtsvfdisnadrlgsseveqvqlvvdgvklmvemekklekgqsiddm ipaqk