Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
Which of the following would be expected to be in region B? Why?
Tryptophan
Phenylalanine
Lysine
Arginine
Serine
Isoleucine
Transcribed Image Text:The image shows a diagram of a protein structure with three labeled sections: A, B, and C.
- **Section A**: Represents a curly, green line indicating an extracellular domain.
- **Section B**: Illustrates a transmembrane region with a characteristic pattern, suggesting a lipid bilayer with embedded segments.
- **Section C**: Depicts another curly, green line indicative of an intracellular domain.
This structure is typical of membrane proteins, where section A would be outside the cell, section B is embedded in the cell membrane, and section C is inside the cell.
Expert Solution
Introduction
The amino acids present in region A are most probably polar in nature because it is the domain of protein that lies outside the cell and it has to interact with extra cellular environment.
Domain B should contain hydrophobic amino acids so that it could be thermodynamically stable in non-polar hydrophobic region of bilipid layer of plasma membrane.
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