when tubulins obtained from particular microtubules of the sea urchin ( ciliary doublet a tubules , flagellar doublet microtubules , and mitotic microtubules ) are analyzed by electrophoresis in a polyacrylamide gel system containing sodium dodecyl sulfate and urea , heterogeneity of the alpha subunit , and differences between the tubulins are revealed .
C0026046
microtubules
C0041348
tubulins