H32-H42 tetramer accounts for the diameter of the octamer. It forms the shape of a horseshoe.

TLS Online TPP Program

#Id: 8799

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 6388

#Unit 2. Cellular Organization

Catabolite repression is exerted through a second messenger called cyclic AMP (cAMP) and the positive regulator protein called the catabolite repressor protein (CRP), a dimer.

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#Id: 2503

#Unit 13. Methods in Biology

In the Isoelectric Focusing pH gradient is formed by the introduction into the gel of compounds known as ampholytes, which are complex mixtures of synthetic polyamino-polycarboxylic acids Ampholytes can be purchased in different pH ranges covering a wide band (e.g. pH 3–10).

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#Id: 2869

#Unit 13. Methods in Biology

The absorption spectra of the bases in polymers are sensitive to pH and greatly influenced by electronic interactions between bases.

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#Id: 9366

#Unit 4. Cell Communication and Cell Signaling

Within the nucleus, R-Smads are modified by:

Phosphorylation of linker domains

Acetylation of MH1 domains

Dephosphorylation of the C-terminal serines by nuclear

phosphatases