Amino acids, Biology

Assignment Help:

 

  • An amino acid is amphiprotic (have both acid and base)

             o    Some are polar, non polar, acidic or basic

  • List of amino acids (red are non-polar, yellow are polar, green are acidic, blue are basic, starred are essential)

 

  •  An amino acid is amphiprotic (have both acid and base)

             o    Some are polar, non polar, acidic or basic

  •  List of amino acids (red are non-polar, yellow are polar, green are acidic, blue are basic, starred are essential)

 
                o    Glycine (gly)
                o    Alanine (ala)
                o    Valine (val)*
                o    Leucine (leu)*                                                                                    
                o    Isoleucine (ile)*
                o    Methionine(met)*
                o    Phenylalanine(phe)*
                o    Tryptophan (trp)*
                o    Proline (pro)

               o    Serine (ser)

 

                                                                1512_properties of Amino Acids.png1568_Amino Acids.png

 

               o    Threonine(thr)*
               o    Cysteine (cys)
               o    Tyrosine (tyr)

               o    Asparagines (asn)
               o    Glutamine (gln)
               o    Glutamic Acid (glu)
               o    Aspartic Acid (asp)

              o    Lysine (lys)*
              o    Arginine (arg)

              o    Histidine (his)

Properties of Amino Acids

Peptide Bond - bond between the acid group of one amino acid and the amino group of another
Dipeptide - 2 amino acids joined by a

peptide bond

  • Coded for by DNA and created by the ribosomes
  • Proteins are long, flexible and able to form different links with themselves or other molecules
  • Have an amino(A)-terminus and a Carboxyl(C)-terminus

Protein Structure

  • A Protein's function depends on its shape which depends on its amino acids

 

  • Primary Structure
    • Long chain of amino acids linked by covalent peptide bonds à in specific order
  • Secondary Structure
    • Intermolecular forces (mostly H-bonds) cause the chain to coil into an α-helix or fold into a β-pleated sheet
  • Tertiary Structure
    • Chaperone proteins help a growing polypeptide fold into its tertiary structure
    • Supercoiling due to polarity, the shape of the amino acids (e.g. proline causes a kink), other components (e.g. iron) and disulfide bridges.
  • Quaternary Structure
    • Various polypeptides join together with intermolecular forces to form a protein

Denaturing of Proteins

  • Change in è Heat, pH, temperature, ionic concentration etc.
    • Can cause changes in the 3-D structure of the protein

                        Change can be permanent if the 1° structure is broken

                        Change can be reversed if only the 3° structure is broken

  • Use of denaturing proteins à Food preservation

 

 

 


Related Discussions:- Amino acids

Prosthetic valve endocarditis, The risk of PVE is greatest during the initi...

The risk of PVE is greatest during the initial 6 months after valve surgery (particularly during the initial 5 to 6 weeks) and thereafter declines to a lower but persistent risk (0

How body fat can be measured, How body fat can be measured? The convent...

How body fat can be measured? The conventional golden method of measuring BF% is by underwater weighing. Difference of weight in air and in water gives density, from which the

What is population density, Q. What is population density? The Populati...

Q. What is population density? The Population density is the relation between the number of individuals of a population and the area or volume they occupy. For instance, in 200

Gastrulation in some animals, Gastrulation in some Animals As mentione...

Gastrulation in some Animals As mentioned before gastrulation marks the beginning of morphogenesis that is development of body form and organisation of cells in the embryo. By

Determine the alpha-islet cells of the pancreas, Determine the alpha-islet ...

Determine the alpha-islet cells of the pancreas. Person X is a healthy human who has volunteered to take experimental drug Y.  Person X has a normal dinner at 6 PM on April 1 a

Procedure for determination of blood glucose -nelson somogyi, Define Proced...

Define Procedure for Determination of Blood Glucose by Nelson Somogyi Method? 1. Label a series of Folins tubes with blank (B), standard (S1-S5) and sample (SA 1-2) and place

Explain the productivity of ecology, Explain the Productivity of ecology? ...

Explain the Productivity of ecology? When scientists study an ecosystem as a whole, they often examine the relationships between feeding, or trophic, levels. In order to do th

Complications of diabetes, Q. Complications of Diabetes? Diabetes, as y...

Q. Complications of Diabetes? Diabetes, as you know, is a lifelong disease. We have said earlier also that it can be controlled but not cured. Control of diabetes by ensuring n

How are solutions classified, Q. How are solutions classified as per to the...

Q. How are solutions classified as per to their comparative tonicity? Comparative to another, a solution can be isotonic or isosmotic, hypotonic or hyposmotic or hypertonic or

Enumerate the term - brain behaviour functioning, Enumerate the term - brai...

Enumerate the term - brain behaviour functioning The brain may be thought of as a "dependant variable" that is shaped in part by the facilitative stimulation that is experience

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd