Abstract
Split firefly luciferase complementation assay (FLCA) is one of the most widely used sensitive and reliable methods for the analysis of constitutive and dynamic protein-protein interactions (PPIs). Here, we report a method for long-term in vivo detects plant protein-protein interactions in Arabidopsis F1 hybrids via Topcount™ Microplate Scintillation Counter or Deep-Cooled CCD camera. Following these protocols, we successfully detected time-dependent PPIs of EARLY FLOWERING 3 (ELF3) and EARLY FLOWERING 4 (ELF4); both of them with LUX ARRHYTHMO (LUX) belong to an evening complex which has been found to play a key role in circadian rhythms, flowering, and growth.
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