Although we generated diverse deletion mutants of human c-Myb and evaluated them by em in vivo /em ubiquitylation assays, only two mutants with deletions in the N-terminal area to amino acid (aa) 220 or 359 (1-220 and 1-359, respectively) completely lost Fbw7-dependent ubiquitylation, while two other mutants using a deletion in the N-terminal area to aa 104 (1-104) or lack of 284 aa residues on the C-terminal (357) were markedly affected (Figure ?(Figure2C)
Although we generated diverse deletion mutants of human c-Myb and evaluated them by em in vivo /em ubiquitylation assays, only two mutants with deletions in the N-terminal area to amino acid (aa) 220 or 359 (1-220 and 1-359, respectively) completely lost Fbw7-dependent ubiquitylation, while two other mutants using a deletion in the N-terminal area to…