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.
Applications:
Suitable for use in ELISA, Western Blot and Immunoprecipitation . Other applications not tested.
Recommended Dilution:
ELISA: 0.05ug/ml
Western Blot: 1ug/ml
Immunoprecipitation: 1-10ug
Optimal dilutions to be determined by the researcher.
Storage and Stability:
Lyophilized powder may be stored at -20 degrees C. Reconstitute with sterile 40-50% glycerol, aliquot and store at -20 degrees C. Reconstituted product is stable for 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.