summaries of all the topics covered in this chapter, point wise , easy to remember , with all the disease - cause , diagnosis , treatment , and biochemical reasoning . very well written notes .
1. Although about 500 amino acid occur in nature, only 20 of them are seen
in the human body
2. Most of the amino acid (except proline) are alpha amino acids, which means
that the amino group is attached to the same carbon to which the
carboxyl group is attached
3. Proteins are made up of 20 standard amino acids in different sequences
and numbers
4. An indefinite number of proteins can be formed
5. Each amino acid has an amino group (NH2), a carboxylic acid group
(COOH) and a hydrogen atom attached to a carbon
6. There is also a side chain (R) which varies from one amino acid to the
other
H
R C COOH
NH2
, CLASSIFICATION OF AMINO ACIDS
Amino acids can be classified in five different ways
1. Classification based on structure
2. Nutritional classification
3. Classification based on metabolic fate
4. Classification based on polarity
5. Amino acids not occurring in proteins
CLASSIFICATION BASED ON STRUCTURE
Amino acids can be classified into 3 groups depending on their reaction
in solution
1. Neutral
2. Acidic
3. Basic
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