Heptanoic acid is an organic compound composed of a seven-carbon chain terminating in a carboxylic acid. It is an oily liquid with an unpleasant rancid odor. It contributes to the odor of some rancid oils. It is slightly soluble in water but well soluble in ethanol and ether.

IE1 peptide refers to an antigenic peptide encoded by the immediate early (IE) gene of mouse cytomegalovirus (mCMV). IE1 peptide is one of the key antigenic peptides expressed during mCMV infection, plays a role in transcriptional activation in the life cycle of mCMV, and is one of the earliest genes expressed in the viral replication cycle. IE1 peptide is an important target for CD8+ T cell response and can be used to study the host immune response to mCMV infection.

Clindamycin inhibits protein synthesis by acting on the 50S ribosomal.