8 13 232010 flagella arrangement figure 47 motile

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Unformatted text preview: Made of chains of flagellin Made flagellin • Attached to a protein hook Attached hook • Anchored to the wall and membrane by the basal body Anchored basal B. Flagella Figure 4.8 13 2/3/2010 Flagella Arrangement Figure 4.7 Motile Cells • Rotate flagella to run or tumble Rotate run or tumble • Move toward or away from stimuli (taxis) • Flagella proteins are H antigens are antigens – e.g., E. coli O157:H7 e.g., E. CW CCW CW CCW Figure 4.9 14 2/3/2010 B2. Flagella: Axial Filaments Flagella: Axial • • • • Endoflagella In spirochetes In spirochetes Anchored at one end of a cell Rotation causes cell to move http://www.cytoviva.com/g allery_flash.htm - Borrelia Figure 4.10 C. Fimbriae & Pili C. Fimbriae Pili 1. Fimbriae allow allow attachment attachment 2. Pili are used to are transfer DNA from one cell to another one Figure 4.11 15 2/3/2010 D. Cell Wall • Prevents osmotic lysis Prevents lysis • Made of peptidoglycan (in bacteria) Made peptidoglycan Figure 4.6 Peptidoglycan • Polymer of disaccharide – N-acetylglucosamine (NAG) & – N-acetylmuramic acid (NAM) • Linked by polypeptides Figure 4.13a 16...
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This note was uploaded on 03/18/2010 for the course BIOL 240 taught by Professor Staples during the Spring '09 term at Canada College.

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