Chains and heterogens:
PDB Chain Sequences:
>1g56A (A:) spqpleqiklsesqlsgrvgmiemdlasgrtltawraderfpmmstfkvvlcgavlarvd agdeqlerkihyrqqdlvdyspvsekhladgmtvgelcaaaitmsdnsaanlllatvggp agltaflrqigdnvtrldrwetelnealpgdardtttpasmaatlrklltsqrlsarsqr qllqwmvddrvagplirsvlpagwfiadktgagergargivallgpnnkaerivviylrd tpasmaernqqiagigaaliehwqr