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.
Proteins are made up of amino acids. If you want to know more, an amino acid is made of an amino group an R group (side chain) a carboxylic acid group, and a central carboâ¦n These form hyrdogen (weak) bonds with one another, creating the four (primary, secondary, tertiary, and qauternary) structures of a protein.