Table 1.

Transporter genes within copy number variants selected in nutrient-limited chemostats.

Gene	Function	Nutrient limitation	References	Species
GAP1	General amino acid permease	Glutamine and glutamate	Gresham et al. (2010), Hong and Gresham (2014)	Saccharomyces cerevisiae
PUT4	High-affinity proline transporter	Proline
DUR3	Plasma membrane transporter for both urea and polyamines	Urea
DAL4	Allantoin permease	Allantoin
HXT6/HXT7	High-affinity glucose transporters (99% identical)	Glucose	Brown et al. (1998), Kao and Sherlock (2008), Gresham et al. (2008)
SUL1	High-affinity sulfate permease	Sulfur	Gresham et al. (2008)
LacY	Lactose permease	Lactose	Zhong et al. (2004)	Escherichia coli