moreover, regulators of cdk4 and cdk6 activity, like adherents families of ink inhibitors (p15, p16, p18 and p19), during <a href=https://www.spairkorea.co.kr:443/gnuboard/bbs/board.php?bo_table=g_inquire&wr_id=3612388>https://www.spairkorea.co.kr:443/gnuboard/bbs/board.php?bo_table=g_inquire&wr_id=3612388</a> are expressed on at low levels, or are not expressed at all.