double immunostaining experiments revealed that the weak cytoplasmic type of ca ii and basolateral ( na+-k+ ) -atpase immunoreactivities were colocalized in 20 to 30 % ( depending on the segment studied ) of the collecting duct epithelial cells but , in contrast , cells rich in ca ii or those with basal band 3 immunoreactivity seldom contained ( na+-k+ ) -atpase .
C0010834
cytoplasmic
C0007634
cells