BIOL 2100 Lecture Notes - Lecture 2: Dehydration Reaction, Peptide, Enantiomer
16 Sep 2018
School
Department
Course
Professor
Proteins/ Diff. Functions
• Signaling
• Enzymes (speed)
• Communication
• Transport/movement
• Defense
• Structural (like structural support keratin)
What we should know about amino acids
• General structure
o All have a central carbon, an amino group, a carboxyl (functional group).
• Has a functional group ^ and a side chain?
• In an aqueous solution, we find these structures are in an ionized form (some acts as a
base or an acid)
o As pH dec., the overall charge becomes more pos. (because of added H proton)
• There is a spectrum of how AAs interact with water, there is no definite affinity
• To determine the affinity, look at the polarity of the side chain, if there is a highly
electronegative atom (O) making the side chain polar, it is hydrophilic
• Whether you are looking at a non-ionized or ionized form, the chain might still be acidic.
• Acid AAs are deprotonated
• Enantiomer: non-identical isomers (mirror image molecules)
• Know the 7 chemical groups and names
• Amino acids are monomers that group together to form polymers which group together
to form polypeptides
