Chains and heterogens:
PDB Chain Sequences:
>1f12A (A:) sssstasasakkiivkhvtviggglmgagiaqvaaatghtvvlvdqtedilakskkgiee slrkvakkkfaenpkagdecvektlstiatstdaasvvhstdlvveaivenlkvknelfk rldkfaaehtifasntsslqitsianattrqdrfaglhffnpvpvmklveviktpmtsqk tfeslvdfskalgkhpvsckdtpgfivnrllvpylmeairlyergdaskedidtamklga gypmgpfelldyvgldttkfivdgwhemdaenplhqpspslnklvaenkfgkktgegfyk yklehhhhhh
>1f12A (A:) kiivkhvtviggglmgagiaqvaaatghtvvlvdqtedilakskkgieeslrkvakkkfa enpkagdecvektlstiatstdaasvvhstdlvveaivenlkvknelfkrldkfaaehti fasntsslqitsianattrqdrfaglhffnpvpvmklveviktpmtsqktfeslvdfska lgkhpvsckdtpgfivnrllvpylmeairlyergdaskedidtamklgagypmgpfelld yvgldttkfivdgwhemdaenplhqpspslnklvaenkfgkktgegfykykle
>1f12B (B:) sssstasasakkiivkhvtviggglmgagiaqvaaatghtvvlvdqtedilakskkgiee slrkvakkkfaenpkagdecvektlstiatstdaasvvhstdlvveaivenlkvknelfk rldkfaaehtifasntsslqitsianattrqdrfaglhffnpvpvmklveviktpmtsqk tfeslvdfskalgkhpvsckdtpgfivnrllvpylmeairlyergdaskedidtamklga gypmgpfelldyvgldttkfivdgwhemdaenplhqpspslnklvaenkfgkktgegfyk yklehhhhhh
>1f12B (B:) kiivkhvtviggglmgagiaqvaaatghtvvlvdqtedilakskkgieeslrkvakkkfa enpkagdecvektlstiatstdaasvvhstdlvveaivenlkvknelfkrldkfaaehti fasntsslqitsianattrqdrfaglhffnpvpvmklveviktpmtsqktfeslvdfska lgkhpvsckdtpgfivnrllvpylmeairlyergdaskedidtamklgagypmgpfelld yvgldttkfivdgwhemdaenplhqpspslnklvaenkfgkktgegfykyk