January 21 - J anuary 21 Golgi apparatus: in the golgi is c...

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January 21 Golgi apparatus: in the golgi is cisternae : have different types of proteins in membrane, doing different things to the proteins (forming them) To study cell movement there is a pulse sent through cell o Pulse is of a radioactive substrate o Then removes substrate o Chase it with nonradioactive medium o What happens? After labeling with substrate look at them at different intervals Proteins move from rough ER to vesicles then to the duct (an exocrine gland) Signal sequences in proteins tell them where to go Carbohydrate tags bond with protein receptors Proteins: filaments make up cytoskeleton, made and broken down o Actin Filaments: smallest, double helix Maintain cell shape, cell division, movement of organelles and muscles o Intermediate Filaments: Keratin, vimentin, lamin, others… In thicker cables Maintain cell shape and anchor nucleus and some other organelles o Microtubules: alpha-tubulins and beta tubulin dimers Hollow tube
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January 21 - J anuary 21 Golgi apparatus: in the golgi is c...

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