Assuming 98% reaction efficiency, calculate the total cumulative yield of the correct PTH-amino acid at the 50^th Edman degradation cycle.

A) A peptide with the primary structure Lys-Arg-Pro-Leu-Ile-Asp-Gly-Ala is sequenced by the Edman degradation procedure. If each Edman cycle is 93% efficient, what percentage of the PTH-amino acids in the fourth Edman cycle will be PTH-Leu?

B) What percentage of the PTH-amino acids in the eighth Edman cycle will be PTH-Ala?

A) A peptide with the primary structure Lys-Arg-Pro-Leu-Ile-Asp-Gly-Ala is sequenced by the Edman degradation procedure. If each Edman cycle is 93% efficient, what percentage of the PTH-amino acids in the fourth Edman cycle will be PTH-Leu?

B) What percentage of the PTH-amino acids in the eighth Edman cycle will be PTH-Ala?