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Apoptosis Dr. F
Apoptosis
| Question | Answer |
|---|---|
| If you have mutated Ced 3 or Ced 4 will the cells die? | No. They inactivate cell death |
| If you knocked out Ced 9 will cells die? | Yes. Ced 9 is a repressor of death |
| What Ced is Bcl-2 homologous to? | Ced 9 |
| When caspase 3 effector cleaves ICAD what does it activate? | CAD |
| Name intiator caspases | Casp 8, Casp 9 and Casp 10 |
| In order for an effector caspase to be activated what must happen? | It must be cleaved |
| In order for an initiator capase to be activated what must happen? | It must be dimerized and cleaved. Once you bring the monomers together as a dimer it autocleaves |
| Name the caspases apart of the extrinsic pathway | Casp 8 and casp 10 |
| Name the caspases apart of the intrisic pathway | Casp 9 |
| Describe the extrinsic pathway | TNF binds to the ligand and then attracts adaptor protein and binding through adaptor proteins activates the initiator caspase by forced dimerization |
| What happens after intiator caspases are activated? | They activate effector caspases leading to a caspase cascade. |
| Describe the intristic pathway | Ced 4/Apaf 1 form a complex with a specific initiator procaspase causing its activation. Then cleaves and activates the effector caspase. |
| Do increased levels of Bcl-2 induce or repress apoptosis? | repress |
| Do increased levels of Bax/Bak induce or repress apoptosis? | Induce |
| What is Ced-3 hoomologous to in mammals? | ICE (interleukin 1B converting enzyme) |