GAL7 is a gene found in the Saccharomyces cerevisiae yeast, which encodes a protein involved in the metabolism of galactose. This gene plays a crucial role in the galactose utilization pathway, allowing yeast cells to convert galactose into glucose, which can then be used for energy. The expression of GAL7 is regulated by the presence of galactose in the environment. When galactose is available, the GAL gene cluster, including GAL7, is activated, enabling the yeast to efficiently utilize this sugar. This process is essential for the growth and survival of yeast in various environments.