1.5M urea, 25mM Tris-HCl pH 8.0, 0.2% Triton-X and 50% Glycerol.

HCV Core Genotype-1a protein was purified by proprietary chromatographic technique.

HCV Core Genotype-1a protein is >95% pure as determined by 10% PAGE (coomassie staining).

Immunoreactive with sera of HCV-infected individuals.

HCV Core Genotype-1a although stable at 4°C for 1 week, should be stored below -18°C. Please prevent freeze thaw cycles.