Chains and heterogens:
PDB Chain Sequences:
>4bl3A (A:) kdkeinntidaiedknfkqvykdssyisksdngevemterpikiynslgvkdiniqdrki kkvsknkkrvdaqykiktnygnidrnvqfnfvkedgmwkldwdhsviipgmqkdqsihie klksergkildrnnvelantgtayeigivpknvskkdykaiakelsisedyikqqmdqnw vqddtfvplktvkkmdeylsdfakkfhlttnetesrnyplgkatshllgyvgpinseelk qkeykgykddavigkkgleklydkklqhedgyrvtivddnsntiahtliekkkkdgkdiq ltidakvqksiynnmkndygsgtaihpqtgellalvstpsydvypfmygmsneeynklte dkkepllnkfqittspgstqkiltamiglnnktlddktsykidgkgwqkdkswggynvtr yevvngnidlkqaiessdniffarvalelgskkfekgmkklgvgedipsdypfynaqisn knldneilladsgygqgeilinpvqilsiysalenngninaphllkdtknkvwkkniisk eninlltdgmqqvvnkthkediyrsyanligksgtaelkmkqgrqigwfisydkdnpnmm mainvkdvqdkgmasynakisgkvydelyengnkkydide