Chains and heterogens:
PDB Chain Sequences:
>1lr2A (A:) atfeivnrcsytvwaaaskgdaaldaggrqlnsgeswtinvepgtnggkiwartdcyfdd sgsgicktgdcggllrckrfgrppttlaefslnqygkdyidisnikgfnvpmnfspttrg crgvrcaadivgqcpaklkapgggcndactvfqtseyccttgkcgpteysrffkrlcpda fsyvldkpttvtcpgssnyrvtfcpta