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.
LÃ¼beck [http://www.luebeck.de/] is a medieval city in Schleswig-Holstein, the northernmost state of Germany. Hamburg lies 58 km (36 mi) to the southwest. It is located on the Trave River, and is the largest German port city on the Baltic Sea.