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Lecture

BI110 Ch 5 30th october.doc

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Department
Biology
Course
BI110
Professor
Matthew Smith
Semester
Fall

Description
Surface Receptors - Integral membrane protein- (domain in the inside and outside ) glycoproteins - Binding of a signal molecules: • Specific fit- like an enzyme binding substrate. • Cytoplasmic end: Activate the receptor molecule - First step in Signal transduction pathway Clicker question 1. A cell that responds to a signal molecule is distinguished from a cell that does not respond by the fact that the cell does respond, has_____ C. a receptor for the signal molecule 2. Which of the following statements about cell surface receptors is FALSE? D. Binding of a signal molecule to a surface receptor changes the conformation of the receptor to allow entry of the signal molecule. Signal Transduction Pathways - Signal relayed in a cell by a series of a protein kinases(enzymes) - Protein Kinase: • Transfer phosphate group from ATP to one or more sites on
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