Chains and heterogens:
PDB Chain Sequences:
>1guvA (A:) aklvcyftnwaqyrqgearflpkdldpslcthliyafagmtnhqlsttewndetlyqefn glkkmnpklktllaiggwnfgtqkftdmvatannrqtfvnsairflrkysfdgldldwey pgsqgspavdkerfttlvqdlanafqqeaqtsgkerlllsaavpagqtyvdagyevdkia qnldfvnlmaydfhgswekvtghnsplykrqeesgaaaslnvdaavqqwlekgtpaskli lgmptygrsftlasssdtrvgapatgsgtpgpftkeggmlayyevcswkgatkqriqdqk vpyifrdnqwvgfddvesfktkvsylkqkglggamvwaldlddfagfscnqgrypliqtl rqelsl
>1guvA (A:) aklvcyftnwaqyrqgearflpkdldpslcthliyafagmtnhqlsttewndetlyqefn glkkmnpklktllaiggwnfgtqkftdmvatannrqtfvnsairflrkysfdgldldwey pgsqgspavdkerfttlvqdlanafqqeaqtsgkerlllsaavpagqtyvdagyevdkia qnldfvnlmaydfhgswekvtghnsplykrsgaaaslnvdaavqqwlekgtpasklilgm ptygrsftlasssdtrvgapatgsgtpgpftkeggmlayyevcswkgatkqriqdqkvpy ifrdnqwvgfddvesfktkvsylkqkglggamvwaldlddfagfscnqgrypliqtlrqe l