In Notch/Delta pathway, 

Notch is receptor protein, on a neighboring responding cell

TLS Online TPP Program

#Id: 8932

#XL - T Zoology

TLS Online TPP Program

#Id: 8933

#XL - T Zoology

TLS Online TPP Program

#Id: 8934

#XL - T Zoology

Spindle assembly checkpoint pathway is active until every single kinetochore has attached properly to spindle microtubules

TLS Online TPP Program

#Id: 8935

#XL - T Zoology

TLS Online TPP Program

#Id: 8936

#XL - T Zoology

When a kinetochore is unattached, the outer kinetochore component Knl1 is phosphorylated by the checkpoint kinase Mps1.

TLS Online TPP Program

#Id: 8937

#XL - T Zoology

Phosphorylated Knl1 binds the checkpoint protein kinase Bub1-Bub3 and checkpoint protein BubR1. These three proteins, recruit the Mad1-Mad2 complex to the kinetochore.