The average estimated cash rent was $202 per acre on top quality land, $161 per acre on average quality land, and $124 per acre on poor quality land. This was an increase in rental rates of 2.0% for top quality land, 1.9% for average quality land, and 2.5% for poor quality land.
R-Group. In solution it is the nature of the amino acid R-groups that dictate structure-function relationships of peptides and proteins.
Based on the R-group structures, identify each amino acid residue and specify the sequence of amino acids in this peptide. Now select protein-sidechain; then select-change color to and pick a color. This will give the R-groups a color distinct from the CPK-colored backbone atoms.Select protein-protein.n an a-helix, the amino acid R-groups protrude out from the helically coiled polypeptide backbone. The surface of an a-helix largely consists of the R-groups of amino acid residues. At right, an a-helix is shown end-on and from the side.