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Modern Genetic Analysis Chapter 9. The Genetics of Bacteria and Phages Working with Microorganisms
Table 9-1. Some Genotypic Symbols Used in Bacterial Genetics

Symbol | Character or phenotype associated with symbol

bio | Requires biotin added as a supplement to minimal medium
arg | Requires arginine added as a supplement to minimal medium
met | Requires methionine added as a supplement to minimal medium
lac | Cannot utilize lactose as a carbon source
gal | Cannot utilize galactose as a carbon source
strr | Resistant to the antibiotic streptomycin
strs | Sensitive to the antibiotic streptomycin

NOTE: Minimal medium is the basic synthetic medium for bacterial growth without nutrient supplements.

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