subunit flux into porcine brain microtubules at steady state has been studied using both radioactive guanine nucleotide and a radioactive tubulin dimer , [ 3h ] ethyltubulin , which is obtained by a reductive ethylation ( zeeberg , b. , cheek , j. , and caplow , m. , ( 1980 ) anal . biochem . 104 , 321 -- 327 ) .
C0026046
microtubules
C0041348
tubulin