Question

Why proteins are having 3 letter symbol and 1 letter symbol?

Answer 1

Answer:

amino acid symbols

Explanation:

symbols symbols that stands for the amino acids, the building blocks of protein. amino acids as both three letter symbol and single letter symbol. for example as we know that three letters and single letter symbols are alanine are Ala and A

Answer 2

Answer:The origin of the single-letter code for the amino acids is of historical interest, and in fact, this story may help the student to learn the code.  The reason for the code is simple enough–in the very early days of bioinformatics, the very fastest computers were in fact, rather clunky.  Dr. Margaret Oakley Dayhoff, arguably the founder of the field of bioinformatics, shortened the code from the three letter designations to the single letter code in an effort to reduce the size of the data files needed to describe the sequence of amino acids in a protein.  The listing of amino acids, the three letter and single letter code, and the explanation for the choice of the single letter is given below.  Note that there are 20 amino acids commonly found in proteins, and 26 letters in the alphabet.  As a result, most of the letters are used.

To develop a single-letter code for the amino acids, Dr. Dayhoff attempted to make the code as easy to remember as possible.  Of course, if the name of each amino acid began with a different letter, the code would be simple indeed.  For 6 of the amino acids, the first letter of the name is unique, making the code simple.  These are:

Amino Acid

3 letter code

Single letter code

Explanation

Cysteine

Histidine

Isoleucine

Methionine

Serine

Valine

Cys

His

Ile

Met

Ser

Val

C

H

I

M

S

V

First letter of the name

First letter of the name

First letter of the name

First letter of the name

First letter of the name

First letter of the name

Explanation: