1. pEt22b is a bacterial expression vector from Novagen.
2. T7 promoter.
3. Amp resistant.
4. N-terminal pelB signal sequence for potential periplasmic localization.
5. optional C-terminal His tag.
6. lacIq.
7. multiple cloning sites.
Look at this site:
http://wolfson.huji.ac.il/expression/commercial-vectors/pet-22b-map.pdf