The structure of amino acid
With a central CARBON atom bonded with
- H-a hydrogen atom
- NH2- a carboxyl functional group
- COOH- a carboxyl functional group
- A distinctive “R-Group” ( side chain)
Amino acid
Molecules that are composed of 20 different building blocks
Classification of Amino Acid
- H bonding ability
- acidic vs basic
- nonpolar, hydrophobia
- polar, hydrophilic
Nonpolar side chain
- no charged or electronegative atoms to form H bond
- H2O HATER
Ex) glyeine, methaine, valine, phenylalanie
Polar side chains
Partial charges can form H bond
-hydrophilic, H2O LOVER
Neural , acidic, basic
Polar Neutral
-they are not strong enough
(OH) tyrosine,serine, asparagine
Polar Acidic
COOH (carboxyl group)
Ex). CH2COOH- very strong
Polar basic
NH2-(n) willing to proton acceptor
Ex) CH2(CH2)2NH2 lysine
Most hydrophilic to most hydrophobic
Valine, aspartate, asparagine, and tyrosine.
Monomer
A molecular subunit!
Ex) an amino acid, a nucleotide, a sugar
ONE PART!!!!!!!!
Polymer
A large number of monomers are bonded together
MANY PARTS
Polymerization
The process of linking monomers together
Condensation reations
Monomer polymerize through condensation reaction ( dehydration reaction)
-monomer in, water out( loss of water molecule)
Hydrolysis
Breaks polymers apart by adding a water molecule
water in, monomer out
Peptide
Fewer than 50 amino acids are linked together
FEWER peptides
Polypeptide
Polymers that contain 50 or more than amino acids
MANY PEPTIDES
