eng Science and Education Publishing World Journal of Chemical Education 2375-1657 2020-07-07 8 3 122 127 10.12691/wjce-8-3-4 WJCE2020834 article Seasonal and Zodiac Sign Properties of the Citric Acid Cycle and the Grouping of Biochemically Important Functional Groups Jef Struyf jef.struyf@ucll.be 1 A Retired Instructor of UCLL Campus Gasthuisberg, Chemistry Bachelors, Herestraat 49, Be-3000 Leuven, Belgium Properties of the intermediates from the citric acid cycle (TCA cycle) match the zodiac signs and correspond to the seasons of the year. The grouping of the twelve most important biochemical functional groups exhibits the same ratios that are typical for the zodiac signs. http://pubs.sciepub.com/wjce/8/3/4/wjce-8-3-4.pdf biochemistry functional groups citric acid cycle citric acid cycle zodiac Krebs cycle TCA cycle tropical zodiac zodiac signs