The genes encoding Islet1, Tbx4, and Pitx1 are expressed in presumptive hindlimbs.

TLS Online TPP Program

#Id: 8912

#Unit 2. Cellular Organization

When all the kinetochores have properly attached to spindle microtubules, APC/CCdc20 directs ubiquitinylation of securin and mitotic cyclins

TLS Online TPP Program

#Id: 8913

#Unit 2. Cellular Organization

APC/CCdc²⁰ is inhibited by a checkpoint pathway that ensures that anaphase is not initiated until all chromosomes have achieved proper attachment to the mitotic apparatus.

TLS Online TPP Program

#Id: 8914

#Unit 2. Cellular Organization

Following securin degradation and a decrease in mitotic CDK activity, separase cleaves the Scc1 subunit, breaking the cohesin circles.

TLS Online TPP Program

#Id: 8915

#Unit 2. Cellular Organization

Mitotic exit network plays an important role in shutting off mitotic cyclins by controlling the activation of the Cdc14 phosphatase through a GTPase pathway.

TLS Online TPP Program

#Id: 8916

#Unit 2. Cellular Organization

Cytokinesis

With the exception of higher plants, the division of the cell is brought about by a contractile ring made of actin and myosin

TLS Online TPP Program

#Id: 8917

#Unit 2. Cellular Organization