The thioester, which form when a Cys side chain condenses with a Gln side chain a few residues away, reacts readily with compounds with the formula ROH or RNH2. Draw the resulting ester and amide reaction products.

Chlorophyll, heme, vitamin B12, and a host of other substances are synthesized from porphobilinogen, which is itself formed from the condensation of two molecules of 5-aminolevulinate. The two 5-aminolevulinates are bound to lysine (Lys) residues in the enzyme, one in the enamine form and the other in the imine form. Condensation is thought to occur via a several step process, one of which is shown below. ÇO2 ÇO2 CO2 + NH3 NH3 H H3N 5-aminolevulinate (enamine form) 5-aminolevulinate (imine form) Porphobilinogen Draw curved arrows to illustrate the movement of electrons in this step of the reaction. Arrow-pushing Instructions CO2 CO2 CO2 CO2 :B BH* H-A H3N H3Ņ

Complete the following chemical reaction by showing the structural formulas of all products  The formation of N-methylpentanamide. Thank you!

Which of the following reaction conditions can be used to synthesize an ester (RCOOR')? An acid halide and an amine in presence of a base (base catalyzed) An amide and an alcohol O A carboxylic acid and an alcohol in presence of a base (base catalyzed) A carboxylic acid and an alcohol in presence of an acid (acid catalyzed)