Chains and heterogens:
PDB Chain Sequences:
>1sg3A (A:) mkffsladeaefksiiisknkavdvigsklggqvvsfsdewfasaenliqptapirdptr fvhsgawydgwetrrhnemeydwviikmgvaaahiiggeidtaffngnhapfvsiealyd egeegniveddsrwveivekfecgpsqrhlfvrgngltkerfthiklkmypdggiarfrl ygrvvppelktkdhiidlayvcngavalkysdqhfgsvdnlllpgrghdmsdgwetkrsr qpghtdwaviqlgressfiekiivdtahfrgnfpqfitvegclkesessentgegtwvel vgksktgpdkehvyeirksirvshvkltiipdggvkrirvwgyhhhhhh
>1sg3A (A:) mkffsladeaefksiiisknkavdvigsklggqvvsfsdewfasaenliqptapirdwyd gwetrrhnemeydwviikmgvaaahiiggeidtaffngnhapfvsiealydegeegnive ddsrwveivekfecgpsqrhlfvrgngltkerfthiklkmypdggiarfrlygrvvppii dlayvcngavalkysdqhfgsvdnlllpgrghdmsdgwetkrsrqpghtdwaviqlgres sfiekiivdtahfrgnfpqfitvegclkgtwvelvgksktgpdkehvyeirksirvshvk ltiipdggvkrirvwgy
>1sg3B (B:) mkffsladeaefksiiisknkavdvigsklggqvvsfsdewfasaenliqptapirdptr fvhsgawydgwetrrhnemeydwviikmgvaaahiiggeidtaffngnhapfvsiealyd egeegniveddsrwveivekfecgpsqrhlfvrgngltkerfthiklkmypdggiarfrl ygrvvppelktkdhiidlayvcngavalkysdqhfgsvdnlllpgrghdmsdgwetkrsr qpghtdwaviqlgressfiekiivdtahfrgnfpqfitvegclkesessentgegtwvel vgksktgpdkehvyeirksirvshvkltiipdggvkrirvwgyhhhhhh
>1sg3B (B:) mkffsladeaefksiiisknkavdvigsklggqvvsfsdewfasaenliqptapirdwyd gwetrrhnemeydwviikmgvaaahiiggeidtaffngnhapfvsiealydegeegnive ddsrwveivekfecgpsqrhlfvrgngltkerfthiklkmypdggiarfrlygrvvppii dlayvcngavalkysdqhfgsvdnlllpgrghdmsdgwetkrsrqpghtdwaviqlgres sfiekiivdtahfrgnfpqfitvegclktwvelvgksktgpdkehvyeirksirvshvkl tiipdggvkrirvwgyh