Lec-41-Chap-12-3

Lec-41-Chap-12-3 - Lecture 41 Biomolecules Moore et al...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 41: Biomolecules M oore et al Chapter 12.9 Review: 3.12, 9.6-7 Learning Objectives • Know the principle types of biomolecules • Know the general structure of an amino acid • Classify an amino acid as polar or nonpolar • Know the geometry and characteristics of a peptide bond • Differentiate between the N-terminal and C-terminal end of a peptide or protein • Differentiate between the primary, secondary, tertiary, and quaternary structure of a protein • Understand the basic structure of α -helices and β -sheets
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Vocabulary Amino acid Peptide Peptide bond Polypeptide Protein Primary structure Secondary structure Tertiary structure Quaternary structure Disulfide bond Types of Biomolecules You have already seen: • Carbohydrates (3.12), including monosaccharides, disaccharides, and polysaccharides • Lipids (fats 3.12 and phospholipids 9.6) • Nucleic acids (DNA 9.7), but not RNA In this chapter we look at: • Proteins and the amino acids from which they are built
Background image of page 2
Amino Acids α− carbon α amino acid: + H 3 N- C H 2 -COO β amino acid: + H 3 N- C H 2 - C H 2 -COO γ amino acid: + H 3 N- C H 2 - C H 2 - C H 2 -COO An α amino acid Proteins are made from α -amino acids The α carbon typically contains a side-chain , indicated by R, that contributes to the molecule’s properties. How many chiral centers are in an α - amino acid? At least one (unless R = H). Amino acids found in cells are usually L-amino acids . Amino acids: compounds containing an amine and a carboxylic acid Amino Acids • di-functional group compounds, carboxylic acid and amine functinal groups α -aminocarboxylic acid - meaning that the amine functional group is one carbon removed from the carboxylic acid functional group
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Amino Acids are Zwitterions p. 592: all amines, carboxylic acids, and acidic and basic side chains are illustrated with neutral charge. p. 788: Amino acids are
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/06/2010 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

Page1 / 13

Lec-41-Chap-12-3 - Lecture 41 Biomolecules Moore et al...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online