L cycle regulation. The LxCxE motif and the tripeptide HDP of the J domain of the polyomavirus tumor proteins make direct contacts with the Rb proteins and Hsc70, respectively; together they effect the release of members of the E2F family of transcription factors from their Rb partners to promote cell cycle progression [reviewed in 55]. There is less certainty about the identity of tAg amino acids
S where phenotyped on MS medium containing 0 and 3 (w/v) Suc and soil (peat/perlite/vermiculite) according to the parameters described previously (Boyes et al., 2001). Seeds were sterilized with chlorine gas and sown on MS medium containing 3 (w/v) Suc followed by 48 h of stratification at 4 . Plants were grown for 2 weeks at 22 with a light intensity of 80 mmol quanta m22 s21 in a 16-h photop
On kit (Promega); 10 mL of radiolabeled protein was added to the reaction, and samples were resolved by SDS-PAGE, dried, and exposed to a phosphor-imaging screen.Plant Material and Growth ConditionsArabidopsis (Arabidopsis thaliana) T-DNA insertional knockout lines for Tric1 (SALK_031707, SALK_112126, and At3g49560) and Tric2 (SALK_136525, SALK_149871, and At5g24650) were obtained from ABRC and sc