biochemistry- protein chemistry
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1
what are protein?
protein are organic nitrogenous substances composed of C,H,N, and O
2
Building units of protein
amino acids.
3
nh2
amino group
4
alpha carbon is between alpha amino group and alpha carboxylic group
bonded by covalent bond
5
Each amino acids has
- tRNA in protein and spscific codon exits in DNA genetic code
6
Amino acid classified into 2
structural and biological value
7
3 types according to structure
- aliphatic amino acid (no ring structure)
- aromatic amino acids ( contain aromatic ring) benzenand phenolic
- heterocyclic amino acid
8
According to aliphatic there are 4 classification
- neutral
- acidic (monoamino-dicarboxylic)
- basic ( diamino-monocarbocylix)
- with side chain containing amide group
9
aliphatic- neutral (non polar, non essential)
glycine, alanine
10
aliphatic- branched (non polar,essential)
iso-leucine, leucine, valine
11
aliphatic- sulphur containing (polar uncharged, non essential)
cysteine
12
aliphatic-sulphur containing (non polar, essential)
methione
13
aliphatic-hydroxy containing (polar uncharged, essential)p
threonine
14
aliphatic-hydroxyl containing( polar uncharged, non essential)
serine
15
Acidic (monoamino-dicarboxylic) Non essential
aspartate, glutamate
16
Basic (diamino-monocarboxylic) semiessential
arginine
17
Basic (diamino-monocarboxylic) essential
lysine
18
With side chain containing amide group (polar uncharged, non essential)
asparagine, glutamine
19
Aromatic amino acids (non polar, essential)
phenylalanine
20
Aromatic amino acids (non essential
tyrosine
21
Heterocyclic amino acids (non polar,non essential)
proline
22
Heterocyclic amino acid (semiessential)
histadine
23
heterocyclic amino acid (non polar, essential)
tryptophan
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