The E.coli derived recombinant protein contains the HCV core nucleocapsid immunodominant regions, amino acids 2-119. 50mM Tris-HCl, pH-8, 60mM NaCl, 10mM glutathione, 0.25% sarkosil & 50% glycerol. HCV Core Genotype-3/10 protein was purified by proprietary chromatographic technique. Immunoreactive with sera of HCV-infected individuals.