lecture_5legge - 1 Amino Acids ( 9/08/2009) 1. What are...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Amino Acids ( 9/08/2009) 1. What are Amino Acids, and what is their 3-D structure? 2. What are the structures & properties of the individual amino acids? 3. What is the peptide bond? 4. Do amino acids have specific Acid-Base properties? 5. Are small peptides physiologically active? Amino Acids The building blocks of proteins α-amino acids because of an amino group next to the C α R group - determines the identity of the particular amino acid Stereochemistry - important property Amino acids are Ampholytes pK 1 ≈ 2.2 while pK 2 ≈ 9.4, pK R for R group pK’s In the physiological pH range, both NH 2 and COOH are completely 2 ionized They can act as either an acid or a base They are Zwitterions , molecules having charged groups of opposite polarity Because of their ionic nature they have extremely high melting temperatures Amino Acids You must know: Their names Their structure Their three letter code Their one letter code Tyrosine, Tyr, Y, aromatic, hydroxyl Classification and Characteristics of Amino Acids R polarity: three main categories to describe amino acids: 1) Non polar “hydrophobic” nine in all Glycine, Alanine, Valine, Leucine, Isoleucine, Methionine, Proline, Phenylalanine and Tryptophan 2) Uncharged polar, six in all Serine, Threonine, Asparagine, Glutamine, Tyrosine,...
View Full Document

This note was uploaded on 02/22/2011 for the course BCHS 3304 taught by Professor Johnson during the Spring '08 term at University of Houston.

Page1 / 6

lecture_5legge - 1 Amino Acids ( 9/08/2009) 1. What are...

This preview shows document pages 1 - 2. Sign up to view the full document.

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