Chains and heterogens:
PDB Chain Sequences:
>1iqrA (A:) gpllvwhrgdlrlhdhpallealargpvvglvvldpnnlkttprrrawflenvralreay rarggalwvleglpwekvpeaarrlkakavyaltshtpygryrdgrvrealpvplhllpa phllppdlprayrvytpfsrlyrgaapplpppealpkgpeegeipredpglplpepgeea alaglrafleaklpryaeerdrldgeggsrlspyfalgvlsprlaaweaerrggegarkw vaellwrdfsyhllyhfpwmaerpldprfqafpwqedealfqawyegktgvplvdaamre lhatgflsnrarmnaaqfavkhlllpwkrceeafrhllldgdravnlqgwqwagglgvda apyfrvfnpvlqgerhdpegrwlkrwapeypsyapkdpvvdleearrrylrlard