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18 - ANNOUNCEMENTS LECTURE 18 CONFLICT FOR THE PRELIM...

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LECTURE 18 CONFLICT FOR THE PRELIM, THURSDAY 10/21? MEET BRIEFLY AFTER CLASS TODAY TO SET THE DAY/TIME FOR THE MAKE-UP EXAM. THIS MEETING HAS NOW HAPPENED: MAKE-UP WILL BE SUNDAY 10/24 NOON - 2:30PM, ROOM TBA . EVERY STUDENT WITH A POSSIBLE CONFLICT MUST E-MAIL THE PROF BEFORE FALL BREAK TO VERIFY THE CONFLICT, AND GET ON “THE LIST” MONDAY’S LECTURE TODAY: ANNOUNCEMENTS NO FRIDAY 2:55PM MEETING THIS WEEK. BUT FRIDAY 10/15 2:55 IN COMSTOCK B108: "HOW TO STUDY FOR THE BIOCHEMISTRY MIDTERM EXAM" . WORD FILE OF THIS DISCUSSION WILL BE POSTED IN BLACKBOARD AS ADDENDUM TO 10/15 LECTURE CONFLICT DIRECT CONFLICT or 3 EXAMS WITHIN 24 HRS or RELIGIOUS OBSERVANCE CHYMOTRYPSIN STEP-BY-STEP MECHANISM MUTATIONS AT THE ACTIVE SITE?! WHY DO SO MANY PROTEIN REQUIRE NON-AMINO ACID COMPONENTS?! HOW ENZYMES ARE REGULATED: 1. CONTROL ENZYME CONCENTRATION 2. CONTROL ENZYME ACTIVITY ALL THE 6 STEPS AFTER BINDING OF S TO E ARE "IN k CAT "
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THE LIMITED CHEMISTRY OF AMINO ACIDS EXAMPLE OF CARBOXYPEPTIDASE A, WHICH NEEDS Zn ++ SUBSTRATE: CARBOXY- TERMINAL PEPTIDE WITH LARGE, NONPOLAR AA BINDING POCKET FOR NONPOLAR AA AT CARBOXY END OF PROTEIN 1. AA HAVE NO MORE ELECTROPOSITIVE ATOMS THAN NH 3 + 2. REDOX RXNS!
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