Chains and heterogens:
PDB Chain Sequences:
>2h90A (A:) salfepytlkdvtlrnriaippmcqymaedgmindwhhvhlaglarggagllvveatava pegritpgcagiwsdahaqafvpvvqaikaagsvpgiqiahagrkasanrpwegddhiaa ddtrgwetiapsaiafgahlpkvpremtlddiarvkqdfvdaarrardagfewielhfah gylgqsffsehsnkrtdayggsfdnrsrflletlaavrevwpenlpltarfgvleydgrd eqtleesielarrfkaggldllsvsvgftipdtnipwgpafmgpiaervrreaklpvtsa wgfgtpqlaeaalqanqldlvsvgrahladphwayfaakelgvekaswtlpapyahwle