Abstract
Differential display has been widely and successfully used to identify differentially expressed genes based on physiological treatments or genetic variation. We used differential display to identify genes based on their site of translation. Identification was made based on the fractionation of RNA from soybean leaves into total RNA, free polyribosomal RNA, and membrane-bound (MB) polyribosomal RNA. Sequences were identified representing RNAs uniquely translated on free or MB polyribosomes. The compartmentalization was confirmed on RNA blots. Differential display of free and MB polyribosomal RNA from genetic mutants or physiological studies has 2 potential advantages. First, the sensitivity of the method is increased. Second, localization of mRNAs to the free or MB compartments may identify genes that are controlled at the level of translation or that switch compartments in response to a treatment.
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