Chains and heterogens:
PDB Chain Sequences:
>1frtA (A:) aeprlplmyhlaavsdlstglpsfwatgwlgaqqyltynnlrqeadpcgawiwenqvswy wekettdlkskeqlfleairtlenqingtftlqgllgcelapdnsslptavfalngeefm rfnprtgnwsgewpetdivgnlwmkqpeaarkeseflltscperllghlergrqnlewke ppsmrlkarpgnsgssvltcaafsfyppelkfrflrnglasgsgncstgpngdgsfhaws llevkrgdehhyqcqveheglaqpltvdl
>1frtB (B:) iqktpqiqvysrhppengkpnflncyvsqfhppqieiellkngkkipniemsdlsfskdw sfyilahteftptetdvyacrvkhvtlkepktvtwdrdm
>1frtC (C:) svflfppkpkdtlmisrtpevtcvvvdvshedpqvkfnwyvdgvqvhnaktkpreqqyns tyrvvsvltvlhqnwldgkeykckvsnkalpapiektiskakgqprepqvytlppsreem tknqvsltclvkgfypsdiavewesngqpennykttppvldsdgsfflyskltvdksrwq qgnvfscsvmhealhnhytqkslsl