H₂N- A(n) HO HO H₂N-C-C-0 CH3 Alanine -C-C-O + H₂N- H Glycine reaction converts glycylalanine to glycine and alanine. This reaction requires

Propose at least three methods to convert C6H5CH2CH2Br to C6H5CH2CH3.

Xylulose-5-phosphate is an intermediate product of metabolism with two stereogenic centers, as shown in the given skeletal structure. It has 1S, 2R configuration at its stereogenic centers. Redraw xylulose-5-phosphate, showing the correct configuration at each of the stereogenic centers. OH fex 2 OH OH OH OH Click and drag to start drawing a structure. X Ś è

Give the products of periodic acid oxidation of each of the following. How many moles of reagent will be consumed per mole of substrate in each case? (a) D-Arabinose (b) D-Ribose (c) Methyl ẞ-D-glucopyranoside (d) CH₂OH HO H O OCH 3 H OH H H H OH

Draw structures for A, B, and C in the following reaction sequence and identify the process that converts B to C.

H-C -OH CH₂OPO₂²- 3-phosphoglycerate ATP ADP Arrow-pushing Instructions AC XT H-C-OH :O: CH₂OPO3²- =C² H-C-OH -O OPO3² Enz-SH 3 CH₂OPO3²- 1,3-bisphosphoglycerate ADP PO S-Enz H-C-OH CH₂OPO3²- One step in the gluconeogenesis pathway for the biosynthesis of glucose is the partial reduction of 3-phosphoglycerate to give glyceraldehyde 3-phosphate. The process occurs by phosphorylation with ATP to give 1,3-bisphosphoglycerate, reaction with a thiol group on the enzyme to give an enzyme-bound thioester, and reduction with NADH. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism. [Enzyme-bound thioester] NADH/H* NAD*, Enz-SH H H-C-OH CH₂OPO3²- Glyceraldehyde 3-phosphate :Ö: H-C-OH CH₂OPO3²- ADP 29