T. aquaticus is a bacterium that lives in hot springs and hydrothermal vents, and Taq polymerase was identified as an enzyme able to withstand the protein-denaturing conditions (high temperature) required during PCR. Therefore, it replaced the DNA polymerase from E. coli originally used in PCR. Taq's optimum temperature for activity is 75â80 Â°C, with a half-life of greater than 2 hours at 92.5 Â°C, 40 minutes at 95 Â°C and 9 minutes at 97.5 Â°C, and can replicate a 1000 base pair strand of DNA in less than 10 seconds at 72 Â°C.
Glucose and fructose are monosaccharides and are the building blocks of sucrose, a disaccharide. Thus, disaccharides are just a pair of linked sugar molecules. They are formed when two monosaccharides are joined together and a molecule of water is removed -- a dehydration reaction.
Is there a disaccharide composed of two fructose molecules? If so, what is it called? Maltose is a disaccharide composed of two glucose molecules. Is there an equivalent disaccharide composed of two fructose molecules? Just wondering, for my own edification... Not that I'd want to ingest any, since fructose is shaping up in the research literature to be an evil, evil thing when used as an... show more Maltose is a disaccharide composed of two glucose molecules. Update: I appear to have answered my own question. Update 2: And no, I was not referring to HFCS (specifically) with my 'fructose is evil' comment. Update 3: As I said, fructose (as an added sugar, in whatever its guises) is being quickly exposed as evil.