Comparative Analysis of the Major Latex Proteins of Opium Poppy
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Opium poppy laticifers contain a pair of low molecular weight proteins that have previously been shown to be latex specific (Plant Physiol. 79, 499, 1985). These peptides are termed the major latex proteins or MLPs. The MLP-A and MLP-B bands resolved by SDS and NP-40 PAGE produce a series of corresponding peptide fragments when cleaved with trypsin, V8 protease, or cyanogen bromide. Similar amino acid compositions for these proteins also indicate that the two MLPs are related. Additional support for a common origin for MLP-A and MLP-B is provided by the precipitation of only one band from the in vitro translation products of immature capsule mRNA by anti-MLP IgG. © 1988, Gustav Fischer Verlag, Stuttgart. All rights reserved.
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