10x8 Color satin finish photograph signed in blue ballpoint ink by Karl Folkers. The signature by President George H.W. Bush is pre-printed. In very good condition. (1906-1997) Karl August Folkers was an American biochemist who made major contributions to the isolation and identification of bioactive natural products.His career was mainly spent at Merck. He played a prominent role in the isolation of vitamin B12 in 1947, which is one of the most structural complexes of the vitamins. As a Merck Pharmaceuticals research team, Folkers, Fern P. Rathe, and Edward Anthony Kaczka were the first to isolate the antibiotic cathomycin in 1955. His team also isolated the antibiotic cycloserine. In 1958 his Merck team determined the structure of coenzyme Q10.He later served as director of the Institute of Biomedical Research at the University of Texas at Austin, where he was also Ashbel Smith Professor of Chemistry.In recognition for his scientific contributions, he received the Perkin Medal in 1960,[8] the William H. Nichols Medal in 1967,[9] the Priestley Medal in 1986, and the National Medal of Science in 1990.This lot came from the Jim Wiggins collection we purchased in July 2022. Jim Wiggins accumulated the most unique and valuable autograph collection over a period of 70-plus years. He obtained his collection either in person or by writing to persons of fame and notoriety. Comes with a full Letter of Authenticity from Todd Mueller Authentics.