Centrosome
Videos
The centrosome is a non-membrane bounded organelle in the animal cell that serves as the main microtubule organizing centre and a regulator of cell-cycle progression. The centrosome provides structure
Role of the centrosome in cell cycle progression
Centrosome (shown by arrow) next to nucleus
Tubulin
Videos
Tubulin in molecular biology can refer either to the tubulin protein superfamily of globular proteins, or one of the member proteins of that superfamily. α- and β-tubulins polymerize into microtubules
kif1a head-microtubule complex structure in atp-form
Tubulin and microtubule metrics
Comparison of the architectures of a 5-protofilament bacterial microtubule (left; BtubA in dark blue; BtubB in light-blue) and a 13-protofilament eukaryotic microtubule (right; α-tubulin in white; β-tubulin in black). Seams and start-helices are indicated in green and red, respectively.