( 2 ) in cells from young adult rats ( 6 months old ) there was a marked increase due to norepinephrine ( 10 ( -8 ) to 10 ( -4 ) m ) in the incorporation of 32p into proteins identified on the grounds of molecular weight as troponin i and c-protein : in cells from senescent rats ( 24 months old ) this increase was much attenuated .
C0007634
cells
C0007581
cells