when the microtubules had attained both a steady state in mass and a constant length distribution , linear incorporation of labeled tubulin dimers over time occurred at rates of 1.45 s-1 at 5 degrees c , 0.48 s-1 at 10 degrees c , and 0.18 s-1 at 20 degrees c .
C0026046
microtubules
C0041348
tubulin