1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erastovalidia [21]
3 years ago
8

Give the pka values for the protonatable groups of glutamine, and then calculate its pi

Chemistry
1 answer:
kherson [118]3 years ago
3 0

Answer :

pKa_1=2.17\\pKa_2=9.13\\pI=5.65

Explanation: Glutamine a amino acid which have 2 protonable groups that is NH_3^+ and COOH having 2 pKa's.

This amino acid has an extra amide group (-CONH_2) group which is not protonable.

The structures with their pKa values are provided in the image below.

pI or isoelectric point is the pH at which the amino acid have no net charge.

In this case, structure B has a net 0 charge, therefore it will have a pI present between pKa_1 and pKa_2.

pKa values of glutamine are:

pKa_1=2.17\\pKa_2=9.13

pI will be

pI=\frac{pKa_1+pKa_2}{2}

pI=\frac{2.17+9.13}{2}

pI = 5.65


You might be interested in
Is the number 5x10 to the power of -4 greater than or less than 1.0?
Vinvika [58]
Greater than, I believe. 5x10 = 50. -4 is the opposite of +4 and 1.0 is just like the positive number one.
4 0
4 years ago
Read 2 more answers
One way a machine can make work easier is by?
Bumek [7]
One way a machine can make work easier is by being faster and more efficient. Most machines can do human work quicker and more successfully.
6 0
4 years ago
What must be known to determine the nature of the salt formed from a weak acid and weak base?
Umnica [9.8K]
D the strength of both acid and base
4 0
3 years ago
Solution made up of two or more liquids
Travka [436]
Would milk coffee count?
3 0
4 years ago
An object has a velocity of 8m/s and a kinetic energy of 480 j what is the mass of the object
MariettaO [177]
Kinetic energy=Ek
Ek=(1/2)mv²
Ek=480 J
v=8 m/s
mass=?

Ek=(1/2)mv²
480 J=(1/2)m(8 m/s)²
480 J=(32 m²/s²) m
m=(480 J)/(32 m²/s²)=15 kg

answer: the mass of the object is 15 kilograms. 
3 0
3 years ago
Other questions:
  • Consider the elements in the periodic table. The stair-step line between the pink squares and the yellow squares separates the _
    5·2 answers
  • The following are all parts of a long bone except the __ ?
    8·1 answer
  • A sample of 1.00 moles of oxygen at 50°C and 98.6 kPa occupies a volume
    15·1 answer
  • Which book has kinetic energy
    9·1 answer
  • Once the sun's energy reaches the earth's atmosphere through radiation, it is circulated within the atmosphere and oceans throug
    15·1 answer
  • The element magnesium has significantly fewer protons and neutrons than gold. If you were to use Mg in place of Au in the Ruther
    7·1 answer
  • What is pH?
    5·2 answers
  • Do Neutros and Protons affect the element?
    9·1 answer
  • Two students (X and Y) measured the diameter of a gold coin four
    12·1 answer
  • Describe how the composition of the upper mantle is different from the lower mantle?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!