1.1.1.3 ? x * 35492, sequence calculation 761404 1.1.1.3 ? x * 85000, SDS-PAGE, threonine sensitive isozyme 246383 1.1.1.3 dimer 2 * 38000, SDS-PAGE, threonine resistant isozyme 246385 1.1.1.3 dimer 2 * 40000, SDS-PAGE 246399 1.1.1.3 dimer 2 * 40600, calculated, 2 * 40000, SDS-PAGE 712490 1.1.1.3 dimer 2 * 55000, SDS-PAGE 246389 1.1.1.3 dimer crystal structure 246396 1.1.1.3 dimer StHSD is composed of a nucleotide-binding region (residues 1-130 and 285-304), a dimerization region (residues 131-145 and 256-284), and a catalytic region (residues 146-255). Presence of a disulfide bond formed between two cysteine residues (position 304) in the C-terminal regions of the two subunits -, 762453 1.1.1.3 dimer x * 89000 + x * 93000, SDS-PAGE, threonine sensitive isozyme 246385 1.1.1.3 hexamer in absence of L-threonine 642340