Chapter 5, Problem 1P

Interpretation Introduction

Interpretation:

To find the average amino acid that resides in protein of typical composition using the table of information provided.

Concept introduction:

The massive chemical compounds created from amino acids are proteins. They measure nearly twenty ordinary amino acids exist as the chemical compound of proteins.

Explanation of Solution

The common relative molecular mass of twenty amino acids is given below:

S.no	Amino acid	Residue mass (Da)
1	Alanine	71.08
2	Arginine	156.2
3	Asparagine	114.11
4	Asparthic acid	115.09
5	Cysteine	103.14
6	Glutamine	128.14
7	Glutamic acid	129.12
8	Glycine	57.06
9	Histidine	137.15
10	Isoleucine	113.14
11	Leucine	113.17
12	Lysine	128.18
13	Methionine	131.21
14	Pherrylalanine	147.18
15	Proline	97.12
16	Serine	87.08
17	Threonine	101.11
18	Tryphophan	186.21
19	Tyrosine	163.18
20	Valine	99.14
	Mean mass=	118.9 Da

Thus, the common mass of all twenty amino acids and its average 118.9 Da.

For example, take into account a typical supermolecule "RuBisCo (Ribulose-1, 5-bisphosphate carboxylase oxygenase)." Its chemical compound monomer has mass of 55, 000 Da and has 500 organic compound amino acid residues. So, the common mass of 500 organic compound residues is below:

$\begin{array}{l}\left(500\right)\times \left(118.9\right)=59,450Da\\ \end{array}$

So, in an exceedingly super molecule a typical composition like RuBisCO, the calculated average mass of an organic compound residue is:

$(\frac{55,000Da}{500aminoacidresidues})=110Da$

Hence, the typical amino acid resides in super molecule and its typical composition is 110 Da.