The Chlorella hexose/H+ symporter is a useful selectable marker and biochemical reagent when expressed in Volvox.

@article{Hallmann1996TheCH,
  title={The Chlorella hexose/H+ symporter is a useful selectable marker and biochemical reagent when expressed in Volvox.},
  author={Armin Hallmann and Manfred Sumper},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1996},
  volume={93 2},
  pages={669-73}
}
The multicellular obligately photoautotrophic alga Volvox is composed of only two types of cells, somatic and reproductive. Therefore, Volvox provides the simplest model system for the study of multicellularity. Metabolic labeling experiments using radioactive precursors are crucial for the detection of stage- and cell-type-specific proteins, glycoproteins, lipids, and carbohydrates. However, wild-type Volvox lacks import systems for sugars or amino acids. To circumvent this problem, the hexose… CONTINUE READING