The GPK in skeletal muscle is a huge protein with multiple subunits:

Kinase subunit contains the catalytic activity that activates GP 

Regulatory subunits is the ubiquitous protein calmodulin

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#Id: 7177

#Unit 5. Developmental Biology

The ectoderm is induced to become epidermal tissue by BMPs

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#Id: 9627

#Unit 4. Cell Communication and Cell Signaling

Monoubiquitinylation of the HER1 cytosolic domain by the E3 ubiquitin ligase c-Cbl

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#Id: 9018

#Unit 6. System Physiology – Plant

When dark‐treated chloroplasts are exposed to light

activate enzymes of the Calvin–Benson cycle that require Mg2+ for catalysis and are more active at pH 8 than at pH 7 for STROMA

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#Id: 1580

#Unit 4. Cell Communication and Cell Signaling

Delipidation process reduces Wnt signaling, creates a negative feedback mechanism for preventing excessive Wnt signaling.

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#Id: 8850

#Unit 2. Cellular Organization

Geminin 

a small protein,, that contributes to the inhibition of re-initiation at origins until cells complete a full cell cycle.