jan 1, 1885 - Phoebus Levene discovers nitrogenous bases

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- American biochemist Phoebus Levene discovered the nitrogenous base adenine.

- He later discovered the remaining bases which are guanine, thymine and cytosine.

- He also discovered ribose sugar in 1909 and deoxyribose sugar in 1929.

- Phoebus had discovered that nucleotides are made up of a sugar molecule attached to a phosphate group and a nitrogenous base.

- He passed away in 1940 but his legacy continued as many were able to build off his findings, including biochemist Erwin Chargaff.

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