Sulfur substitution for carbon or oxygen often lowers the Kd of a molecule due its more effective:

If a mutant virus is able to avoid antibody binding by mutating one of its coat protein amino acids from an arginine to an aspartate, what amino acid should be substituted in the antibody binding site to compensate and bind the mutant aspartate side chain?

Consider a molecule A that has 3 chiral centers. How many diastereomers exist for A? think carefully. 

62. Give a brief description of the following: A.  Epitope B.  Lysogeny

Identify the writer of the following work: “I’m Nobody, Who are you?”

The departed lover of the narrator in “The Raven” is: 

Identify the writer of the following work: “Annabel Lee”

Born into slavery in 1797 in upstate New York, and living all the way through the Civil War era to 1883, this woman would rise to become one of “the nation’s most flamboyant advocates of the rights of African-Americans and women.”

Olaudah Equiano’s The Narrative of the Interesting Life of Olaudah Equiano found an enthusiastic American audience even though it depicted the inhumanity of slavery in a time of legal American slavery.

Which members of a truss are typically in tension when a gravity load is applied?