BIOL 123 Lecture Notes - Lecture 13: Dynein, Nitrogen Fixation, Microtubule
Document Summary
Bacterial and archaea display diverse types of movements. Lack a plasma membrane covering, an internal cytoskeleton of microtubutles made of the protein tubulin, and the motor protein dynein. Do not repeatedly bend or straighten, instead they spin, propelled by molecular machines complosed of a filament, hook, and a motor that work together somewhat like a boats outboard motor and propeller. Outside the cell, the long stiff curved filaments acts like a propeller. Archaeal flagella also rotate but are thinner than bacterial, made of. Some prokaryotic species twitch or glide across surfaces using threadlike cell surface diffferetn proteins , and powered by atp instead structures known as pili. Requires protein know as ftsz which is the tubulin proteins that makes up eukaryotic microtubules. Ftsz squeezes dividing cells into two progeny cells. Place measured volume of sample into plastic dishes filled with semisolid nutrient medium.
