Tobacco syntaxin

These binding sites were found both in the non-plasma-membrane fraction and in the plasma-membrane fraction. This may harmonize the above conflicting reports using microinjection. In any case, the ABA reception site seems to be associated with the membrane. Recently, Leyman et al. reported that a tobacco syntaxin, a membrane-associated protein involved in ABA signaling, may be a promising candidate as an ABA receptor [21]. 

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