protein isolation

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ggkk
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protein isolation

hai all,
i started this topic in the title"protein isolation in pqe-30 vector".
 i can't go for western. the washing steps procedure was estabilished for pEt29 vector. i used the same here. but no protein.
when i checked cell lysates ( harvested cells + lysis buffer+ sonicaton), i find the 130kd band in uninduced , induced ones.still, there is no change in intensity of band.
i have used  Xl-blue cells as host.
can any one suggest  a method to  get protein.
thank you