- Expression, purification, crystallization and preliminary X-ray diffraction studies of recombinant class B non-specific acid phosphatase of Salmonella typhimurium. Makde, R.D., Kumar, V., Gupta, G.D., Jasti, J., Singh, T.P., Mahajan, S.K. Acta Crystallogr. D Biol. Crystallogr. (2003)