Introduction to Proteins

•What are some foods with proteins?

PROTEINSOne or more polypeptides, which are polymers of amino acids Functions:

1. Support 2. Enzymes 3. Transport 4. Defense5. Hormones 6. Motion

Amino Acids

20 Amino Acids

What is Phenylalanine? Is it bad for you?

• Coke Can, Yogurt, Mints

Phenylketonuria (PKU)Amino acid called phenylalanine

Does eating turkey make you sleepy?

• Tryptophan- Amino Acid

Peptides • Check out foldable

• Peptide bond

• Between C and N - Polarity

Protein Definitions

• Peptide

• Polypeptide– Avg. human _____

• Protein

– Hemoglobin

Protein Structure

• Primary Structure-• Secondary Structure-– Alpha helix– Beta sheet– (hydrogen bonds -dots)

• Tertiary Structure • Quaternary Structure

R Group

• Nonpolar • Polar • Ionized • Protein Folding Lab

Denaturation

Tests for Proteins

• Biurets Test

are

Hydrogen Bonds in Protein Secondary Structure:

Denaturation of Proteins (pH & Heat)

• Review Hydrogen Bonds: http://www.youtube.com/watch?v=LK7ERiCy5b8

- Hair Straightener: - http://www.youtube.com/watch?v=Zf-

g4k7ZIjA

Keratin ( Hair Protein)

NUCLEIC ACIDS

Polymers of Nucleotides• DNA • RNA

• ATP

Nucleotides

• 3 parts 1. 2. 3.

DNA vs. RNA Pentose Sugar

- DNA- - RNA-

Nitrogen Base - DNA - RNA

Monomer Polymer ( DNA, RNA)

Sugar Phosphate Backbone

ATP

• Adenosine Triphosphate

1. 2. 3.

ATP ADP