Enzymes Flashcards
Lock and Key theory by who and when
Fischer in 1890
Induced fit theory by who and when
Koschland in 1959
Substrate is _____ and enzyme is ____
Substrate is lock
Enzyme is key
Prosthetic group
Non protein co factor such as metallic ions (Zinc, Copper, Iron)
Coenzymes
Cofactors that are small organic molecules
NAD FAD NADP
Lack of vit B produces
beriberi
Enzymes of arctic snow flea work at
-10°C
Thermophilic bacteria enzymes
90°
Lipase (pancreas) optimum pH
8.0
Lipase (stomach)
4-5
Lipase (castor oil)
4.7
Pepsin
1.5-1.6
Trypsin
7.8-8.7
Urease
7.0
Invertase
4.5
Maltase
6.1-6.8
Amylase (pancreas)
6.7-7.0
Amylase (malt)
4.6-5.2
Catalase
7.0
Competitive inhibitor example
Sulphonamide
Non competitive inhibitors examples
cyanide, heavy metal ions, insecticides