Chains and heterogens:
PDB Chain Sequences:
>1j99A (A:) sddflwfegiafptmgfrsetlrkvrdefvirdedviiltypksgtnwlaeilclmhskg dakwiqsvpiwerspwveseigytalsetesprlfsshlpiqlfpksffsskakviylmr nprdvlvsgyffwknmkflkkpksweeyfewfcqgtvlygswfdhihgwmpmreeknfll lsyeelkqdtgrtiekicqflgktlepeelnlilknssfqsmkenkmsnysllsvdyvvd ktqllrkgvsgdwknhftvaqaedfdklfqekmadlprelfpwe