In all epithelia, keratin filaments associate with: Desmosomes (cell–cell contact)

Hemidesmosomes (cell–matrix contact)

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#Id: 1006

#Unit 5. Developmental Biology

Ligand for Toll receptor protein- Spätzle protein

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#Id: 984

#Unit 5. Developmental Biology

Drosophila eggs undergo superficial cleavage.

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#Id: 5551

#Unit 7. System Physiology – Animal

The principal cells reabsorb sodium and water from the lumen and secrete potassium ions into the lumen

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#Id: 7792

#Unit 2. Cellular Organization

Ran is a small monomeric G protein

That exists in either a GTP-bound or a GDP-bound conformation & provides the energy to drive unidirectional transport of macromolecules through the nuclear pore.

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#Id: 3353

#Unit 6. System Physiology – Plant

Each rotation of 120 ^o , ϒ comes into contact with a different β subunit, and the contact forces that β subunit into the β-empty conformation.