22 - ANNOUNCEMENTS LECTURE 22 HOMEWORK, READING, AS IN LG...

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LECTURE 22 ANNOUNCEMENTS HOMEWORK, READING, AS IN LG FOR 10/22 & 10/25 PLUS THE PyMOL ASSIGNMENT #7, CARBOHYDRATES FRIDAY'S LECTURE PROTEINS IN MEMBRANES FUSION OF BIOMEMBRANES TODAY INTRO TO CARBOHYDRATES MIDTERM EXAM INFO RE FINAL EXAM: MONDAY 12/13, 2 - 4:30PM. MAKE-UP FINAL EXAM WILL OCCUR AFTER 12/13 IN ORDER TO ACCOMMODATE ANY STUDENTS WHO ARE SICK ON 12/13. DO NOT CONTACT THE PROF TO ASK FOR A SPECIAL EARLY FINAL EXAM. AS WITH THE MIDTERM EXAM, PROF WILL WORK WITH THOSE WHO HAVE A FINAL EXAM CONFLICT WHEN THE EXAM DATE GETS CLOSER THIS WEEK'S OFFICE HOURS AND REVIEW SESSIONS: IN THE USUAL ROOMS AT THE USUAL TIMES EXCEPT THAT PROF'S OFFICE HOURS ON THURSDAY 10/21 WILL RUN FROM 8AM - NOON. END OF TODAY'S LECTURE: INFO ABOUT MIDTERM EXAM INTERESTING POLITICS OF MEDICINE TALK JUST BEFORE MIDTERM EXAM:
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PROTEINS POLYNUCLEOTIDES POLYSACCHARIDES 4. LIPIDS LIMITED TYPES OF COMPOUNDS & RXNS
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CARBOHYDRATES α - D β -D α -D β -D EQUIL. OF ISOMERS IN WATER: RIBOSE 20% 56% 6% 18% GLUCOSE 36% 64% <1% <1% 1. ENERGY CYCLE OF BIOSPHERE DEPENDS UPON CARBOHYDRATE OXIDATION 2. STRUCTURAL ROLE 3. RECOGNITION ROLE GIVEN SAME (CH 2 0) n , KEY IS THE STRUCTURAL VARIETY FROM SMALL VARIATIONS LINEAR FORM IS << 1% R'-CH=O + R''OH R'-C-OR'' OH H HEMIACETAL H - O: NUCLEOPHILIC ATTACK CAN BE ABOVE OR BELOW PLANE OF RING RETAINS OX. LEVEL OF ALDEHYDE OR KETONE; MORE REACTIVE THAN -COH THIS ATTACK FORMS 5- MEMBER RING, “FURANOSE” THIS ATTACK FORMS 6-MEMBER RING, “PYRANOSE” “ANOMERIC” C = (CH 2 0) n e.g. 5 FORMS OF RIBOSE .. ONE C OF ANY SACCHARIDE IS ALDEHYDE OR KETONE RINGS ARE FORMED FROM LINEAR BY HEMIACETAL (ACETAL) RXN
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GLUCOSE, GALACTOSE, AND SOME DERIVATIVES Glc = GLUCOSE Gal = GALACTOSE Man = MANNOSE Rib = RIBOSE C(H 2 O) n 1 2 3 4 5 6 Glc Gal CARBOHYDRATES ARE "WATER-LIKE" RECOGNIZE THESE
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This note was uploaded on 12/10/2011 for the course BCHEM 3350 taught by Professor Feig during the Fall '09 term at Cornell.

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22 - ANNOUNCEMENTS LECTURE 22 HOMEWORK, READING, AS IN LG...

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