pGEX vectors are frequently utilized in bacterial systems to express polypeptides or entire proteins as fusions with glutathione S-transferase. Using this fusion system, a polypeptide sequence is linked to the C-terminus of the 26 kD GST protein from Schistosoma japonicum. The bacterially expressed GST-fusion proteins are purified by absorption with glutathione-agarose beads. The fusion protein is subsequently eluted from the glutathione agarose with an excess of free glutathione. Antibodies to GST are used to detect pGEX-expressed fusion proteins and as immuno-affinity reagents for purification of recombinant proteins.
Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.