Given is a polypepetide in the presence of the enzyme pepsin. N-gly-arg-met-phe-ala-lys-ser-tyr-gly C, What fragments can be formed?

Given the structure below: CH,OH но H. OH H H ОН НО Which of the following choices corresponds to the Fischer projection of the straight-chain form of the pyranose above? ÇHO н-с-он но-с-н H-c-OH н-с-он ČH,OH ҫно но-с-н но-с-н н-с-он н-с-он ČH,OH сно н-с-он н-с-он но-с-н н-с-он CH,OH сно но-с-н Н-с-он но-с-н H-c-OH снон ҫно H-C-OH но-с-н но-с-н H-c-OH Снон A B D E O A OB OC O D O E

Enumerate all the possible DNA nucleotide base sequence for the amino acids given.

Compare and contrast structural features of collagen and α-keratin (OK to do this as a list or table comparing/contrasting 3-4 points, e.g. type of helices, noncovalent and covalent interactions between helices, favored residues). Can you please help?