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