Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

Beneath some environmental conditions the halophile Halobacterium halobium synthesizes a membrane protein (MW 26,000) bacteriorhodopsin, which is purple as it comprises retinal. Molecules of this protein aggregate into purple.

Patches in the cell membrane. Bacteriorhodopsin acts as a light activated proton.

Pump which gives energy for cell functions. X-ray analysis of this protein

Reveals that it comprises of seven parallel alpha-helical segments, each of which transverses the bacterial cell membrane (thickness 4.5 nm = 45Å).

a) Compute the minimum number of amino acids essential for one segment of alpha-helix to traverse the membrane completely.

b) Estimate the fraction of the bacteriorhodopsin protein which takes place in alpha-helical form.

Biology, Academics

  • Category:- Biology
  • Reference No.:- M937908

Have any Question? 


Related Questions in Biology

What characteristics of sahelanthropus tchadenssis exclude

What characteristics of Sahelanthropus tchadenssis exclude it from being considered human?

Book reviewbook criteria that should go without sayingthe

BOOK review: Book criteria that should go without saying: The book must be  non fiction. The book must be about  Astronomy .  The book cannot be the textbook.  Book Reviews must be at least two pages.

The lac operator binds the lac repressor the dna sequence

The lac operator binds the lac repressor. The DNA sequence of the lac operator shares a characteristic with the DNA sequences of the binding sites of many restriction enzymes. What is this common characteristic?

Explain why the removal of great sharks poses a threat to

Explain why the removal of great sharks poses a threat to bay scallops on the Atlantic Coast of North America, despite the fact that large sharks do not feed on scallops. Include the concept of a trophic cascade in your ...

Dolly dolly and more dollyit all started with a sheep named

Dolly, Dolly, and More Dolly It all started with a sheep named Dolly. In the mid-1990s, scientists proved convincingly that after decades of trying, we could, indeed, clone mammals - and even possibly, human beings. Unsu ...

A bond with a par value of 1000 and a semi annual coupon

A bond with a par value of $1000 and a semi annual coupon has a nominal yield to maturity of 5.3% and a current price of $920 . if the bond has 6 years to maturity, what is its current yield?

What is the difference between cis-acting elements and

What is the difference between cis-acting elements and trans-acting factors in the regulation of DNA?

Imagine you do a test cross between a purple-flowered pea

Imagine you do a test cross between a purple-flowered pea plant having serrated leaves (a dominant trait) and a white-flowered pea plant having smooth edges. If the purple-flowered plant is heterozygous for both traits, ...

Parents were concerned about their 16-year-old son for the

Parents were concerned about their 16-year-old son for the following reasons: he had no deepening of his voice, scanty pubic and axillary hair growth, absence of beard and mustache growth, small penis, poor muscular deve ...

Discuss the concept of risk and diversification and

Discuss the concept of risk and diversification and highlight types of risk correlation within portfolio with more than one asset?

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen