Latif , K., Naz, S., Altaf , I., Huang, J. dong, Bashir, R., Aslam , F. and Shaozhen Xing 2022. Optimizing factors for the efficient expression and purification of spao and lamb from Salmonella typhi . Bioscience Journal . 38, (Sep. 2022), e38084. DOI:https://doi.org/10.14393/BJ-v38n0a2022-61149.