Chains and heterogens:
PDB Chain Sequences:
>1aifA (A:) diqltqspafmaaspgekvtitcsvsssisssnlhwyqqksetspkpwiygtsnlasgvp vrfsgsgsgtsysltissmeaedaatyycqqwnsypytfgggtkleikradaaptvsifp psseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstl tltkdeyerhnsytceathktstspivksfnrnec
>1aifB (B:) evklqesggglvqpggsmklscvasgftfnnywmswvrqspekglewvaeirlnsdnfat hyaesvkgkfiisrddsksrlylqmnslraedtgiyycvlrplfyyavdywgqgtsvtvs sakttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqs dlytlsssvtvpstwrpsetvtcnvahpasstkvdkki
>1aifH (H:) evklqesggglvqpggsmklscvasgftfnnywmswvrqspekglewvaeirlnsdnfat hyaesvkgkfiisrddsksrlylqmnslraedtgiyycvlrplfyyavdywgqgtsvtvs sakttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlqs dlytlsssvtvpstwrpsetvtcnvahpasstkvdkki
>1aifL (L:) diqltqspafmaaspgekvtitcsvsssisssnlhwyqqksetspkpwiygtsnlasgvp vrfsgsgsgtsysltissmeaedaatyycqqwnsypytfgggtkleikradaaptvsifp psseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstl tltkdeyerhnsytceathktstspivksfnrnec