Abstract: The present invention relates to an adjuvants, particularly to the use of a well-characterized plant based iridoid glycoside adjuvant from plant Picrorhiza kurroa, acting as an adjuvant against T-dependent antigen and specifically against HBsAg and typhoid antigens. The present invention also relates to the method of producing the iridoid glycoside adjuvant and the products utilizing such adjuvants for induction of cellular immunity. The adjuvants may be used alone or with specific antigens. The two antigens used in the study represents HBsAg, a recombinant antigen expressed in Pichia pastoris, and typhoid Vi polysaccharide purified from Salmonella typhi broth.

Abstract: A novel process for the purification of recombinant protein expressed as particle is herewith described. In this purification process, the protein is purified by hydrophobic interaction. The interaction of this protein step resulted in an increase in recovery and purity from 15%-80%. the protein further purified has its application in vaccines and pharmaceuticals.

Abstract: The present invention is based on the isolation of a gene coding for streptokinase from Streptococcus equisimilis (ATCC 9542), its cloning, and expression in E. coli. Two different strategies were carried out for the production of enzymatically-active streptokinase. In the first strategy, streptokinase was expressed as an inclusion body without its signal sequence followed by purification, solubulization, and renaturation to obtain an active preparation. The purified enzyme was formulated and lyophilized. In the second strategy, enzymatically-active streptokinase is secreted into the culture medium. The enzyme was purified, formulated and lyophilized.