Actin is a globular protein that is a major constituent of the cellular cytoskeleton. Actin can exist in monomeric form as G-actin (globular actin) or can form filaments (F-actin, filamentous ...

Spir proteins nucleate actin polymerization by assembling a linear actin oligomer along a cluster of four actin-binding WH2 domains, and this process is enhanced by formins of the Cappuccino family.

Skimmed milk has a little more calcium than semi-skimmed, which in turn has a little more calcium than whole milk. The reason is simply that as the fat is removed, the watery proportion of the ...

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