Chains and heterogens:
PDB Chain Sequences:
>1hkkA (A:) aklvcyftnwaqyrqgearflpkdldpslcthliyafagmtnhqlsttewndetlyqefn glkkmnpklktllaiggwnfgtqkftdmvatannrqtfvnsairflrkysfdgldldwey pgsqgspavdkerfttlvqdlanafqqeaqtsgkerlllsaavpagqtyvdagyevdkia qnldfvnlmaydfhgswekvtghnsplykrqeqsgaaaslnvdaavqqwlqkgtpaskli lgmptygrsftlasssdtrvgapatgsgtpgpftkeggmlayyevcswkgatkqriqdqk vpyifrdnqwvgfddvesfktkvsylkqkglggamvwaldlddfagfscnqgrypliqtl rqel