Objective To investigate the relationship of graph pattern of Hansenula polymorpha(HP)-derived hepatitis B surface antigen(HBsAg) purified by hydrophobic interaction chromatography(HIC) to HBsAg and protein contents.Methods Eight batches of the HP-HBsAg samples for small-scale preparation,five batches of samples for small-scale verification test and five batches of Saccharomyces cerevisae(SC)-derived HBsAg as control were purified by hydropobic chromatography,and determined for protein and HBsAg contents by...