Proteins - Proteins proteins have 7 main functions enzyme...

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Proteins proteins - have 7 main functions enzyme catalysis - faciliates/speeds up certain chemical reactions; ex. enzymes defense - recognizes foreign microbes; forms the center of the immune system; ex. immunoglobulins, toxins, antibodies transport - moves certain small molecules/ions; ex. hemoglobin, proton pump support - structural role; ex. fibers, collagen (most abundant protein in vertebrates), keratin, fibrin motion - contracting muscles; ex. actin, myosin regulation - receives/sends information to regulate body functions; ex. hormones storage - holds molecules such as calcium and iron; ex. ferritin amino acid - 20 different kinds used in specific orders to form proteins molecule consists of an amino group, carboxyl group, hydrogen atom, and side group (determines the molecule's characteristics) connected to a central carbon atom nonpolar amino acids have CH2 or CH3 as side group polar amino acids have oxygen or hydrogen as side group charged amino acids have acids/bases as side group aromatic amino acids have organic rings w/ alternating single/double bonds as side group
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