Chains and heterogens:
PDB Chain Sequences:
>2an3A (A:) msgadrspnagaapdsapgqaavasayqrfepraylrnnyapprgdlcnpngvgpwklrc laqtfatgevsgrtlidigsgptvyqllsacshfeditmtdflevnrqelgrwlqeepga fnwsmysqhacliegkgecwqdkerqlrarvkrvlpidvhqpqplgagspaplpadalvs afcleavspdlasfqraldhittllrpgghllligaleeswylagearltvvpvseeevr ealvrsgykvrdlrtyimpahlqtgvddvkgvffawaqkvglehhhhhh
>2an3A (A:) vasayqrfepraylrnnyapprgdlcnpngvgpwklrclaqtfatgevsgrtlidigsgp tvyqllsacshfeditmtdflevnrqelgrwlqeepgafnwsmysqhacliegkgecwqd kerqlrarvkrvlpidvhqpqplgagspaplpadalvsafcleavspdlasfqraldhit tllrpgghllligaleeswylagearltvvpvseeevrealvrsgykvrdlrtyimpahl qtgvddvkgvffawaqkv
>2an3B (B:) msgadrspnagaapdsapgqaavasayqrfepraylrnnyapprgdlcnpngvgpwklrc laqtfatgevsgrtlidigsgptvyqllsacshfeditmtdflevnrqelgrwlqeepga fnwsmysqhacliegkgecwqdkerqlrarvkrvlpidvhqpqplgagspaplpadalvs afcleavspdlasfqraldhittllrpgghllligaleeswylagearltvvpvseeevr ealvrsgykvrdlrtyimpahlqtgvddvkgvffawaqkvglehhhhhh
>2an3B (B:) apdsapgqaavasayqrfepraylrnnyapprgdlcnpngvgpwklrclaqtfatgevsg rtlidigsgptvyqllsacshfeditmtdflevnrqelgrwlqeepgafnwsmysqhacl iegkgecwqdkerqlrarvkrvlpidvhqpqplgagspaplpadalvsafcleavspdla sfqraldhittllrpgghllligaleeswylagearltvvpvseeevrealvrsgykvrd lrtyimpahlqtgvddvkgvffawaqkvg