Under native conditions only 12 mg/l of protein was purified in case of pET28a(+)vector and large fraction of protein was present in lysed cell pellet confirming the presence
of expressed protein in inclusion bodies. In case of pQE30UA vector, 1.2 mg/l was eluted under native conditions and no clear band of purified protein was observed in gel. In both the vectors,the protein was observed in the lysed cell pellet and purification
under denaturing conditions was required to get the maximum yield of purified protein