How was Albrecht Kossel awarded the Noble Prize in Physiology or Medicine?

Name: Albrecht Kossel.
Country: Germany.
Date of Birth: 16 September 1853.
Died: 5 July 1927.
Education: University of Strassburg, University of Rostock.
Subjects Of Study: DNA base, Nucleic acid protein.
Known as: Discovery of histidine, Discovery of histones, Discovery of nucleobases Theophylline.
Noble Prize Year: Nobel Prize for Peace in 1910, for his work in determining the chemical composition of nucleic acids, the genetic substance of biological cells.