Schizosaccharomyces pombe

Schizosaccharomyces pombe, also called "fission yeast", is a species of yeast. It is used as a model organism in molecular and cell biology. It is a unicellular eukaryote, whose cells are rod-shaped. Cells typically measure 3 to 4 micrometres in diameter and 7 to 14 micrometres in length. It is also possibly the eukaryote with the shortest genome (about 13.8 million base pairs).
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a yeast species used for recombinant protein expression fermentations.