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.
Martinsburg, Pennsylvania. Martinsburg is a borough in the Morrisons Cove section of Blair County, Pennsylvania, United States. The population was 1,958 at the 2010 census. It is part of the Altoona, PA Metropolitan Statistical Area.