Abstract
AbstractA method is described for extracting and comparing internal granule proteins from a normal commercial soft wheat variety (QAL2000) and related wx starch mutants (QA‐Wx‐59 and QA‐Wx‐1). Our results demonstrate that granule‐bound starch synthase I (GBSS I) was by far the most abundant internal protein of starch granules from QAL2000. Several minor, smaller bands observed in gels were also identified by MS as GBSS I peptides. The GBSS I peptides were detected in only trace amounts in the wx mutants. Proteins corresponding to other starch biosynthetic enzymes were present in QAL2000 and the wx mutants.
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