Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s...
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Transcript of Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s...
![Page 1: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/1.jpg)
Proteins
are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus
amino acids: – unit of proteins
– about 20 different types
– essential and non-essential types
![Page 2: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/2.jpg)
An amino acid molecules
H2Namino group
COOHcarboxyl group
C
R
H
![Page 3: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/3.jpg)
The condensation and hydrolysis of a polypeptide
5
1 4
3
2
1 2 3 4 5
hydrolysiscondensation
![Page 4: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/4.jpg)
Condensation of two amino acid to form a dipeptide
H2N C
R1
H
C
O
OH HN
H
C
H
R2
COOH
H2N C
R1
H
O
H
C
H
R2
COOHC---N
H2O
![Page 5: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/5.jpg)
Functions of proteins
components of cell membranes and cytoplasm
for growth and repair of body cells for making enzymes, hormones, antibodies and
haemoglobin provide energy during starvation excess protein is under deamination in the liver deficiency disease: Kwashiorkor
![Page 6: Proteins s are compounds of carbon, hydrogen, oxygen, nitrogen and sometimes sulphur, phosphorus s amino acids: –unit of proteins –about 20 different types.](https://reader036.fdocuments.in/reader036/viewer/2022082711/56649f2b5503460f94c46c2e/html5/thumbnails/6.jpg)
Test for proteins / Biuret test
egg white solution
1 cm3 NaOH solution
Put CuSO2 solution drop by drop, and shake the mixture after addition of each drop
Positive result: purple colour