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Effect of ethylene on activation of monomeric G proteins in 750 mm KCl (A) and Triton X-100 (B) fractions from Arabidopsis wild-type (□) and etr1-1 (▪) plants. After extraction, proteins were labeled with [α-32P]GTP and subjected to SDS-PAGE followed by autoradiography. Experimental points are derived from scans of autoradiographs.
