The holoenzyme of protein phosphatase (PP) from tulip petals was purified by using hydrophobic interaction, anion exchange and microcystin affinity chromatography to analyze activity towards p-nitrophenyl phosphate (p-NPP). The catalytic subunit of PP was released from its endogenous regulatory
We suggested previously that temperature-dependent tulip (Tulipa gesneriana) petal movement that is concomitant with water transport is regulated by reversible phosphorylation of an unidentified plasma membrane intrinsic protein (PIP). In this study, four full-length cDNAs of PIPs from tulip petals
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