consistent with these structural studies , a comparison of the distribution and cellular content of zo-1 , a polypeptide localized exclusively to the tight junction , revealed no significant differences in either the localization of zo-1 or the amount of zo-1 per micron of junction ( i = 1,415 +/- 101 molecules/micron , ii = 1,514 +/- 215 molecules/micron ) .
C0007634
cellular
C0242358
tight junction