Parenchyma cells

Most parenchyma cells retain the ability to divide and differentiate into other types of plant cells under particular conditions—during wound repair, 

for example, It is even possible to grow an entire plant from a single parenchyma cell.

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γ-secretase complex contains 

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

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Cleavage by the γ-secretase complex releases the Notch cytosolic segment, which translocates to the nucleus, interacts with a single DNA-binding transcription factor, CSL.

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Growth factors and EGFs are synthesized as TM proteins, regulated cleavage of the precursor by members of the ADAM protease releases the active molecule into the extracellular space.

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Cell-adhesion molecules (CAMs) mediate direct cell-cell adhesions.

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Adhesion receptors mediate cell-matrix adhesions

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Homophilic Binding 

A CAM on one cell can directly bind to the same kind of CAM on an adjacent cell