... to beperformed to determine the binding site. In plants, PtdIns(3)P, PtdIns(4)P, PtdIns(5)P,PtdIns(3,4)P2, PtdIns(3,5)P2and PtdIns(4,5)P2havebeen detected. In contrast, PtdIns(3,4,5)P3has ... protein in crude membrane fractions with anti-PCaP1. Lanes 1 and 6, A. thaliana; lanes 2 and 7, Raphanus sativus; lanes 3 and 8, Brassica rapa;lanes 4 and 9, B. rapa var. glabra; lanes 5 and 10, B. oleracea ... hyperos-motic and salt stresses have been shown to induce an increase in PtdIns(4,5)P2and PtdIns(3,5)P2 in yeast,Chlamydomonas and some plant cells [9,37,38]. In ani-mal cells, although PtdInsPs...