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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Sec12

acts as a GEF factor for Sar1

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Sar1 is the only GTPase switch protein activated at the ER membrane

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ARF and Sar1 similar to Ras

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Depolymerization of the clathrin coat into triskelions  by Cytosolic Hsp70

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A clathrin molecule,

called a triskelion, is composed of : 

Three heavy chains

Three light chains

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