STABILITY OF THE MAIZE CHROMOSOMAL HIGH-MOBILITY-GROUP PROTEINS, HMGAAND HMGB, IN-VIVO

Chromosomal non-histone high-mobility-group (HMG) proteins represent e ssential components of eukaryotic chromatin and have also been isolate d from a variety of plants. In maize, studies on structure and functio n of the two larger of the four major HMG proteins have recently been performed and are now extended by analysis of their in vivo stability using pulse-chase experiments in a cell suspension culture. The half-l ife of the analyzed HMGa and HMGb proteins was found to be 65 h or mor e than 78 h, respectively.