THE INCORPORATION OF p-FLUOROPHENYLALANINE INTO TOBACCO MOSAIC VIRUS

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Abstract
Disks of diseased tobacco leaf tissue were treated with phenylalanine and with the analogue p-fluorophenylalanine. The expressed sap was separated into its components by agar gel zone electrophoresis. p-Fluorophenylalanine was shown to be incorporated into TMV at a reduced rate as compared with the natural amino acid phenylalanine. The analogue inhibited incorporation of phosphorus, a reversal probably due to the increase in phenylalanine observed in the soluble amino-acid-free fraction.