raw both possible disaccharides of D-psicose and D-mannose that are joined by an α(1→4) glycosidic linkage. Are either of them now a reducing sugar?

What does this statement mean: "Upon folding of a protein many main chain amides replace their hydrogen bonds to water for those with other amide bonds"  Is this true for alpha helix in proline racemase? and is there a pattern?

Draw the enediolate intermediate of the ribulose-5-phosphate isomerasereaction (Ru5P → R5P).

Which of the following an anomer of a-D-galactopyranose? CHOH OH OH HO. CHOH HO. CH,OH HO. H. H. CH,OH HO. -ェ6- 6一ェHーさ

Which of the following is an anomer of B-D-gulopyranose? O O го ОН H ОН H ОН H H ОН CH₂OH -II- H H ОН ОН CH2OH H ОН ОН CH2OH О 0. H CH2OH то Н H H ОН H H - о H ОН ОН H ОН H ОН ОН H О ОН ОН H N

Write a structural formula for a tetrapeptide composed of phenyl-alanine, glycine, aspartic acid, and histidine in which the phenylalanine is N-terminal and the histidine is C-terminal. How many different tetrapeptides could be written that fit the criteria in this question?

Why can six-carbon sugars sometimes form furanose rings and other times pyranose rings?

gal(a1→6)gal(a1→6)glc(a1→2B)fru. Which of the complete IUPAC of this tetrasaccharide? a-D-galactopyranosyl-(1→6)-ß-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-B-fructofuranose a-D-galactopyranosyl-(1→6)- a-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-ß-fructofuranoside a-D-galactopyranosyl-(1→6)- a-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1<→2)-ß-fructofuranose a-D-galactopyranosyl-(1→6)-B-D-galactopyranosyl-(1→6)- a-D-glucopyranosyl-(1→2)-ß-fructofuranoside

Draw the sturucture Turanose: -D-glucopyranosyl-(13)--D-fructofuranose

Write the name for the trisaccharide depicted below (for example, of the form a - D - xylofuranose). Be sure to include if the sugars are in the pyranose or furanose conformations in the name and include the linkages between sugars (for example, (2 - - > 4)). CH₂OH ОН OH н ОН -CH₂ H\H ОН н н ОН CH2OH н ОН но н н ОН