Lecture 13.Feb19 - BIO 311C Spring 2010 Lecture 13 –...

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Unformatted text preview: BIO 311C Spring 2010 Lecture 13 – Friday 19 Feb. Your Exam will be returned during your discussion period today and on Monday. Rebecca will go over Exam questions as requested during the discussion periods. CHO CH 2 OH An Abbreviated Way of Showing the Structural Formula of D-glucose * Review Ways of representing α-D-glucose Ways of representing β-D-glucose 1 6 6 1 * The "OH" on the disguised aldehyde or ketone functional group is written downward for α-sugars and is written up for β-sugars. β α The ring form of a sugar is often shown in an abbreviated form. α-D-glucose In the abbreviated form:- the points where lines intersect represent carbon atoms;- the hydrogen atoms on carbon atoms 1 - 5 are not shown; and- the OH groups on carbon atoms 2 - 4 are shown only as vertical straight lines. * abbreviated form A modified sugar is a molecule that resembles a simple sugar, but with some modification Example: D-glucose a simple sugar 2-amino-D-glucose a modified sugar * Typically only one functional group of a simple sugar is altered in a modified sugar. α-D-ribose 2-deoxy- α-D-ribose α-D-glucose 2-amino- α-D-glucose α-D-glucose-6-phosphate ome important modified sugars in cells * remove oxygen atom * Illustration and Description of a Polymer Representation of a polymer monomers bonding arrangement Polymers are large molecules that are characterized by:- many identical (or very similar) small molecules called monomers that are chemically bonded together- a characteristic kind of chemical bonding holding the monomers together. Most monomers that are used to form polymers in living cells have an H atom and an OH functional group that are removed during polymer formation. * Formation (synthesis) of a polymer in a dehydration reaction....
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This note was uploaded on 06/11/2010 for the course BIO 48765 taught by Professor Sathasvian during the Spring '10 term at University of Texas.

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Lecture 13.Feb19 - BIO 311C Spring 2010 Lecture 13 –...

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