Abstract
The biochemical properties of ricin at different stages of seed i.e. from immature to mature seed were studied. Hemagglutination, SDS-PAGE and UV-spectrometry studies showed total absence of RCA protein in the immature seed. Interestingly, ricin extract on SDS-PAGE showed only one protein band with a molecular weight of 29,000 dalton corresponding to the molecular weight of A chain of ricin. Our results have shown that at immature seed level only the toxic moiety of ricin (A chain) is being synthesized first and gradually the RCA and B chain of ricin.
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