dec 31, 1868 - Fredrich Miescher,  nuclein, a compound that consisted of nucleic acid that he extracted from pus cells i.e., white blood cells (WBC
Description:
 "while in 1868, Fredrich Miescher, a Swiss biologist reported nuclein, a compound that consisted of nucleic acid that he extracted from pus cells i.e., white blood cells." (from ncbi.nlm.nih.gov/pmc/articles/PMC3178936/) 
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