Welcome to 3.091
Lecture 30
November 25, 2009
Biochemistry: Amino Acids
Figure 11.3b
Test 3
avg = 68.8
std dev = 13.9

−
x-s

−
x
−
x+s
All things are made of atoms – little
particles that move around in perpetual
motion, attracting each other when they
are a little distance apart, but repelling
upon being squeezed into one another.
R. Feynmann, R. Leighton, M. Sands
The Feynmann Lectures on Physics
Courtesy of California Institute of Technology. Used with permission.
Courtesy of John Wiley & Sons.
Used with permission. Source: Spencer,
J. N., G. M. Bodner, and L. H. Rickard.
Chemistry: Structure and Dynamics.
2nd edition, supplement.
New York, NY: John Wiley & Sons, 2003.
Courtesy of John Wiley & Sons. Used with permission. Source: Spencer, J. N., G. M. Bodner, and L. H. Rickard.
Chemistry: Structure and Dynamics. 2nd edition, supplement. New York, NY: John Wiley & Sons, 2003.
Amino Acid
Alanine
Cysteine
Aspartic Acid
Glutamic Acid
Phenylalanine
Glycine
Histidine
Isoleucine
Lysine
Leucine
Methionine
Asparagine
Proline
Glutamine
Arginine
Serine
Threonine
Valine
Tryptophan
Tyrosine
Side-Chain
pKA
Ala A Cys C8.33
Asp D3.90
Glu E4.07
Phe F
Gly G His H6.04
Ile I
Lys K10.79
Leu L
Met M Asn N Pro P
Gln Q Arg R12.48
Ser S
Thr T
Val V Trp W Tyr Y10.13
compiled by Andrew Magyar
Courtesy of Andrew Magyar. Used with permission.
Courtesy of Andrew Magyar. Used with permission.
compiled by Andrew Magyar
Courtesy of Andrew Magyar. Used with permission.
compiled by Andrew Magyar
MIRROR
MIRROR
Image by MIT OpenCourseWare.
Figure 24.4
Image by MIT OpenCourseWare.
Figure 24.5
Chiral and Achiral Molecules
Mirror
H
Br
Cl
*
H
F
F
*
H
180o rotation
Br
Cl
*
Cl
Br
F
Bromochlorofluoromethane: Cannot be Superimposed
Mirror
H
H
Cl
Cl
F
F
H
180o rotation
Cl
Cl
Cl
Cl
F
Dichlorofluoromethane: Can be Superimposed
Image by MIT OpenCourseWare.
Figure 24.7
Image by MIT OpenCourseWare.
Figure 24.6
1.0 g solute / 1 mL solvent / 10 cm path length
 specific rotation
Image by MIT OpenCourseWare.
Figure 24.8
Image by MIT OpenCourseWare.
toluene = methyl benzene
trinitrotoluene = TNT
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The Boston Christmas Tree, version 2007
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3.091SC Introduction to Solid State Chemistry
Fall 2009
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