procaine or tetracaine , at the concentration range of 0.5 -- 20 mm and of 0.5 -- 5 mm respectively , increases the rate of tubulin polymerization ( 24 degrees c or 37 degrees c ) and of microtubule depolymerization ( 4 degrees c ) as a linear function of the concentration of the anesthetics , while identical amounts of microtubules are formed .
C0041348
tubulin
C0026046
microtubules