Animal cells have small mitochondrial genomes 16.6 kb in mammals. There are several hundred mitochondria per cell and each mitochondrion has multiple copies of the DNA.

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#Id: 10048

#Unit 4. Cell Communication and Cell Signaling

ADAM 10 is a matrix metalloprotease, a member

of a class of metal-containing enzymes that cleave the

extracellular segments of target proteins.

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#Id: 10049

#Unit 4. Cell Communication and Cell Signaling

ADAM is an abbreviation for a disintegrin and

Metalloprotease (disintegrin is a conserved protein domain that binds integrins and disrupts cell-matrix interactions)

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#Id: 10050

#Unit 4. Cell Communication and Cell Signaling

Binding of Notch to Delta 

is followed by endocytosis of Delta by the signaling cell

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#Unit 4. Cell Communication and Cell Signaling

The force accompanying the movement of Delta into the signaling cell stretches the Notch protein on the responding cell and allowing access by ADAM 10, which cleaves the Notch extracellular domain

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#Id: 10052

#Unit 4. Cell Communication and Cell Signaling

Second cleavage of Notch occurs within membrane-spanning region & catalyzed by γ-secretase

TLS Online TPP Program

#Id: 10053

#Unit 4. Cell Communication and Cell Signaling

γ-secretase complex contains 

Presenilin 1 (actual protease), aph-1, pen-2, & nicastrin