Desmosine is formed from four Lys residues

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#Id: 8049

#Section 2: General Biology

Isoleucine and Threonine have two chiral carbons so exists in multiple RS configuration.

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#Id: 2229

#Section 3: Genetics, Cellular and Molecular Biology

The Birth of a Gene - Duplication is the most common way that new genes arise in eukaryotes. 

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#Id: 8130

#Section 2: General Biology

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#Id: 9293

#Section 2: General Biology

Ammonium assimilation in roots

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#Id: 7746

#Section 2: General Biology

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.