What was Johann friederich miescher famous for?

Johann Friedrich Miescher was a Swiss physician and biochemist best known for his discovery of DNA in 1869. He isolated a substance he called "nuclein" from the nuclei of white blood cells, which was later identified as deoxyribonucleic acid (DNA). Miescher's work laid the foundation for the field of molecular Biology and the understanding of genetic material. His pioneering research significantly contributed to the study of heredity and the biochemical basis of life.