The P34 protein is the main allergen for soybean sensitive humans. Soybean protein P34, a thiol protease belonging to the papain family, is a monomeric allergen having an N-terminal amino acid sequence and amino acid composition identical to that of the seed 34kDa protein. It is an insoluble glycoprotein having a pI of 4.5 and a calculated mass of 28.643 Dalton, representing 2–3% of total soybean protein. Upon glycosylation, the mass will be somewhat larger, resulting in a ~32kDa band in non-reduced SDS PAGE gels. It exhibits no enzymatic function due to an absence of the catalytic cysteine. P34 is stored in storage vacuoles of soybean cotyledons.
The E.Coli derived GST Tag recombinant protein, 36kDa, contains Soybean P34 Protein epitopes 214-261, 351-379 amino acids.
Purified by proprietary chromatographic technique
Protein is >95% pure as determined by 10% PAGE (coomassie staining) and RP-HPLC.
50mM Tris-HCl, pH 8.0, 60mM NaCl, 10mM glutathione and 50% glycerol.
Soybean P34 His although stable at 4°C for 1 week, should be stored below -18°C.
Please prevent freeze thaw cycles.
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