Style proteins of a wild tomato (Lycopersicon peruvianum) associated with expression of self-incompatibility

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Abstract
The identification, isolation and aminoterminal sequencing of two S-genotype-associated proteins from style extracts of Lycopersicon peruvianum Mill. is reported. There is a high level of homology between these two sequences and with the amino-terminal sequences of other S-allele-associated glycoproteins isolated from Nicotiana alata Link et Otto. These sequences were obtained by a new high-sensitivity method of selected twodimensional gel analysis followed by electroelution and purification of proteins by inverse-gradient high-performance liquid chromatography before sequencing.