Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

Under some environmental conditions the halophile Halobacterium halobium synthesizes a membrane protein (MW 26,000) bacteriorhodopsin, which is purple because it contains retinal. Molecules of this protein aggregate into purple patches in the cell membrane.

Bacteriorhodopsin acts as a light activated proton pump that provides energy for cell functions. X-ray analysis of this protein reveals that it consists of seven parallel alpha-helical segments, each of which transverses the bacterial cell membrane (thickness 4.5 nm=45Å).

a. find out the minimum number of amino acids necessary for one segment of alpha-helix to traverse the membrane completely

b. Estimate the fraction of the bacteriorhodopsin protein that occurs in alpha-helical form.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M925025

Have any Question? 


Related Questions in Biology

Lab an introduction to genetic processespart a dna

Lab: An Introduction to Genetic Processes Part A: DNA Replication and Protein Synthesis and Sources of Variability Exercise Exercise 1 . Illustrate your understanding of complimentary bases and DNA Replication by providi ...

Question 1 in drosophila melanogaster eyeless ey is a

Question 1: In Drosophila melanogaster, eyeless (ey) is a recessive trait in which the eyes are tiny or absent. The ey locus is found on chromosome 4. Monosomy and trisomy for this very small chromosome are compatible wi ...

Experiment 4 exercise 1 mitosis in a plant cellread through

Experiment 4 Exercise 1: Mitosis in a Plant Cell Read through the Experiment 4 Introduction material before starting. In this exercise we will look at the different stages of mitosis in onion cells. The length of the cel ...

Write my microbiiology research paper this research paper

Write my microbiiology research paper This research paper should be about the microorgansims that caused bacterial vaginosis the signs and symptoms diagnosis and treatment of Bacterail Vaginosis. Thhe information should ...

Chose a topic and answer the questionsthe topic is

Chose a topic and answer the questions The topic is : Metabolic rate measures and methods Prompts: 1. What is the method? General information about the methods. 1. Why would a researcher use this method? The particular f ...

Conclusion for five kingdom classification merits and

Conclusion for five kingdom classification merits and demerits.

In the following experiment students plated e coli top

In the following experiment, students plated E. coli (top right), S. epidermidis (top left), P. Aeruginosa (bottom right) and E. aerogenes (bottom left) on Trypticase soy agar (Yellow media), Glucose mineral salts agar ( ...

Assignmentmany mutations such as sickle cell anemia has mal

Assignment Many mutations such as sickle cell anemia has mal formed proteins. People with sickle cell trait are carriers of a defective hemoglobin S gene causes the RBC to be stiff and rough, what takes place is that the ...

The scientific language of god assignmentthree parts if

The Scientific Language of God Assignment Three parts if this assignment to submit on Blackboard 1. Write a 3-4 sentence executive summary for each of the following three article links- (That means a paragraph on each of ...

Biologyeukaryotic and prokaryotic cells can be compared to

Biology Eukaryotic and prokaryotic cells can be compared to mini-factories, with multiple organelles working together to perform numerous cellular processes. After reviewing the parts of a eukaryotic or prokaryotic cell: ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate