Coenzymes. Coenzymes: A nonprotein component of enzymes is called the cofactor. If the cofactor is organic, then it is called a coenzyme. Coenzymes are relatively small molecules compared to the protein part of the enzyme. Many of the coenzymes are derived from vitamins.
twoâ²-step`. 1. a ballroom dance in duple meter, marked by sliding steps. 2. a piece of music for, or in the rhythm of, this dance.
A two-step skin test is the administration and reading of two TSTs typically placed 1-3 weeks apart. According to CDC guidelines if two TB tests are completed within 12 months, this can be considered a valid two-step TB skin test.* There are two options for conducting two-step testing: 1.