Difference in radiosensitivity of valyl-tRNA synthetases isolated from chick embryo liver and brain.

The sensitivity in vitro against gamma-radiation of valyl-tRNA synthetase (VRS) from chick embryo brain proved to be higher than that of liver VRS. In order to study this phenomenon properties of VRS isolated from both organs were compared. Both enzymes have the same molecular weight (Mr = 110 000) determined by equilibrium sedimentation and by gel… (More)