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D-glucose  D: CH 2 OH at C5 goes up  L: CH 2 OH at C5 goes down 5.

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Presentation on theme: "D-glucose  D: CH 2 OH at C5 goes up  L: CH 2 OH at C5 goes down 5."— Presentation transcript:

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2 D-glucose

3  D: CH 2 OH at C5 goes up  L: CH 2 OH at C5 goes down 5

4

5  If OH at C1 is on the same side of the ring as the CH 2 OH group, the sugar is beta  If the OH at C1 is on the opposite side of the ring as the CH 2 OH group, the sugar is alpha  Let’s make our example beta

6 Same side

7  We need to know the configuration of the OH groups at carbons 2, 3, and 4  How do we do this?  Go back to the Fischer (Rosanoff) projection  Then lay it over on it’s side to the right

8 D-glucose

9  Put the remaining OH groups on the Haworth ring at C2, C3, and C4 in the same orientation (up or down) as they are in the leaned over Fischer/Rosanoff structure

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