Salts of quaternary ammonium cations are known. Choline is a family of water-soluble quaternary ammonium compounds. Further variations include changes in the cations to include quaternary ammonium cations. It is an organic salt classified as a quaternary ammonium compound. Influenza viruses are susceptible to bleach, 70% ethanol, aldehydes, oxidizing agents, and quaternary ammonium compounds. It is also useful for determining the tertiary structure and quaternary structure of purified proteins. The commercial deposits of diatomite are restricted to Tertiary or Quaternary periods. Proteins contain 4 elements in regards to their structure&colon; primary, secondary, tertiary and quaternary. Compounds were listed as binary, ternary, quaternary, etc. The result is ternary, quaternary, or even quinary compositions. The territory consists of land of the tertiary and quaternary periods. Protein complexes are a form of quaternary structure. It was active during the late Tertiary into the early Quaternary. The quaternary structure of nucleic acids is similar to that of protein quaternary structure. Examples of proteins with quaternary structure include hemoglobin, DNA polymerase, and ion channels.