Genetic complementation group

Probably nearly 200 rodent mutant lines have now been isolated and tested by genetic complementation for their genetic identity. Complementation at first involved cell-fusion techniques and this finally established the existence of 11 complementation groups, each representing a single gene. 

Cava, J.R., Tao, H., Noel, K.D. Mapping of complementation groups within a Rhizobium legu-minosarum CFN42 chromosomal region required for lipopolysaccharide synthesis. Mol Gen Genetics 221 (1990) 125-128. 

S. cerevisiae mutants blocked in the conversion of 4-HB to (Figure 19) are unable to grow on oxidizable carbon sources. An extensive genetic analysis of these mutants led to the identification of the various steps involved in the conversion of 4-HB to Nine complementation groups designated (COQJ—COQ9) were identified among the mutants unable to form These mutants proved to be a very valuable resource... 

Tea leaf, in common with all plant leaf matter, contains the full complement of genetic material, enzymes, biochemical intermediates, carbohydrates, protein, lipids, and structural elements normally associated with plant growth and photosynthesis. In addition, tea leaf is distinguished by its remarkable content of methylxathines and polyphenols. These two groups of compounds are predominantly responsible for those unique properties of tea that account for its popularity as a beverage. It must be noted that the chemical composition of tea leaf varies with climatic condi-... 

---