00:01
We are asked why it's easier to add tubulin to existing microtubules rather than to start a microtubule from scratch.
00:10
We are also asked to explain how gamma tubulin in the center zone helps overcome this.
00:24
So two tubulin dimers have a lower affinity for each other than a tubulin dimer has for the end of a microtubule.
00:36
And recall that infinity means the likelihoodness to bind each other or the attraction to each other or another filament.
01:17
So the reason why this is is because tubulent dimers have less binding sites.
01:40
Whereas a tubulin dimer and microtubial pair, so tubulin dimer to make.
01:55
Microtubial would have more possibility for interaction sites because they have both end -to -end to tubulin dimers by adding to it a protophilament and side -to -side of the tubular dimers interacting with tubuline subunits in adjacent proto -filaments forming the ring -like cross -section.
02:30
So tubulin dimers to microtubules binding, they have end -to -end binding and side -to -side.
02:44
So this gives them more possibilities to bind...