Polar Amino Acids An amino acid is polar when the R group is an alcohol, thiol, or amide. 11. Acidic Amino Acids An amino acid is acidic when the R group is a carboxylic acid. 12. Basic Amino Acids An amino acid is basic when the R group is an amine.
Friedensburg is a census-designated place (CDP) in Schuylkill County, Pennsylvania, United States. The population was 828 at the 2000 census.
York, Pennsylvania. York (Pennsylvania German: Yarrick), known as the White Rose City (after the symbol of the House of York), is the county seat of York County, Pennsylvania, United States,[3] located in the south-central region of the state.