The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii.

The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 109 m; 1 pm = 1 X 10-12 m.

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#Unit 2. Cellular Organization

Actin filament treadmilling is accelerated by:

Profilin and Cofilin

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#Unit 2. Cellular Organization

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#Unit 2. Cellular Organization

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#Unit 2. Cellular Organization

Filament capping proteins:

CapZ blocks (+)end Tropomodulin blocks (-)end

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#Unit 2. Cellular Organization

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#Unit 2. Cellular Organization

Two major classes of actin-nucleating proteins:

1. Formins nucleate the assembly of unbranched filaments 

2. Arp2/3 complex nucleates the assembly of branched actin networks