02 - MIC170 4/2/09 Lecture 2 (Thursday, 4/2) 1. Yeast...

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MIC170 – 4/2/09 1 Lecture 2 (Thursday, 4/2) 1. Yeast Biotechnology discussed in Lecture 1. 2. Medical microbiology Yeasts are always good for us? - Allergy to baking/brewing yeast - Opportunistic pathogens --- When immune system is not functioning well Most common is candidiasis (women’s “yeast infection”) by Candida albicans Life-threatening yeast infection in AIDS patients and organ transplant patients under immunosuppressing treatments
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MIC170 – 4/2/09 2 Fig. 1.14 from Textbook Yeast Cells (1) What is yeast? Yeast is a member of the Kingdom of Fungi. The word, “fungus” derives from “funus” meaning “corpse” ---- “fungi” are general term for organisms found associated with decaying plant and animal material. They obtain nutrients exclusively by absorption --- no photosynthesis (like plants) or ingestion (like animals) Fungi that grow unicellularly (rather than filamentously) are generally called yeasts On the other hand, people often call filamentous fungi “mold” Let’s look at a yeast cell hand out Fig. 2.3 (handout KS-2) Like other eukaryotes, yeast cells have various membrane-bound subcellular compartments (= organelles ) -> true eukaryotes Complex intracellular structures and bigger (5~6 μ m in length, 2~3 μ m in diameter) than E. coli . Yeast cells have all the organelles characteristic of
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This note was uploaded on 06/11/2009 for the course MIC 170 taught by Professor Shiozaki during the Spring '09 term at UC Davis.

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02 - MIC170 4/2/09 Lecture 2 (Thursday, 4/2) 1. Yeast...

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