Uses of Proteins

(i)    Protein constitute as essential part of our food, meat, eggs, fish, cheese provide protein to human beings. 
(ii)    Casein (a milk protein) is used in the manufacture of artificial wool & silk. 
(iii)    Amino acid needed for medicinal use & feeding experiment, are prepared by hydrolysis of proteins. 
(iv)    Gelatin is used in desserts, salad’s, candies bakery goods etc. 
(v)    Leather is obtained by tanning the protein of animal hides. 
(vi)    Hemoglobin present in blood is responsible for carrying oxygen and CO₂. 
(vii)    Hormones control various process. 
(viii) Enzymes are the proteins produces by living system & catalyse specific biological reaction. 

 Example: 
    Ureases (Urea → CO₂ + NH₂) 
    Pepsin (Protein → Amino acid) 
    Trypsin (Protein → Amino acid) 
    Carbonic anhydride (H₂CO₃ → H₂O + CO₂) 
    Nuclease (RNA, DNA →Nucleotides)