the cell cycle behavior of the tubulin isoforms was examined by two-dimensional gel electrophoresis of proteins labeled in vivo and by translation of rna in vitro . alpha 1- , alpha 2- , beta 1- , and beta 2-tubulin synthesis increases coordinately until metaphase , and then falls , with beta 2 falling more rapidly than beta 1 .
C0597298
isoforms
C0033684
proteins