with colcemid concentration equal to 0.5 mcg/ml , the following dynamics of events is observed for the cell centre : after the microtubules attached to the satellites had disappeared , clusters of electron dense material appear around the centrioles ( 6 hour incubation ) , then short microtubules occur among clusters ( 8 hour incubation ) to be subsequently retained ( up to 40 hour incubation ) .
C0007634
cell
C0026046
microtubules