Emil Fischer had a profound impact on our modern understanding of D-glucose. He did much of his work in sugars and won a Nobel Prize in Chemistry in 1902, but also helped to identify peptide bonds in amino acids. He was a German organic chemist who made many strides towards the knowledge of glucose. Fischer determined the molecular structure of glucose as C6H12O6 and how the atoms were connected. Fischer also discovered glucose exists in two forms: D-Glucose which occurs in nature, and is characterized by plane-polarized light rotating left to right, while L-Glucose, the non-naturally occurring type rotates plane-polarized light from right to left. All discoveries up until this point had to do with D-Glucose as no one had synthesized the other form. Fischer went on to discover D-Glucose could occur in one of two ring forms, or a straight chain. Unfortunately, after Fischer's incredible discoveries he suffered an early death, as he took his own life as a result of two of his sons dying in World War I, severe depression, and a bout with cancer. He died at 66, but will forever be remembered for his incredible influence in organic chemistry.