Chapter 28, Problem 28.91CP

Interpretation Introduction

Interpretation:

The main classes and subclasses of enzyme of that catalyze the first two steps in the conversion of tyrosine to epinephrine has to be determined.

Concept Introduction:

Hormones: Hormones are chemical messengers which are secreted by the cell in endocrine system and are transported along the blood to stimulate the target cells having the corresponding receptors.

Enzyme: Enzyme is a protein or a molecule which can act as a catalyst for a biological reaction. It does not affect the equilibrium point of the reaction. Enzyme’s activity can be specific which means the activity is limited to a certain substrate and a certain type of reaction and it is referred to as specificity of the enzyme.

Classification of enzymes:

• Oxidoreductases: Used to catalyze oxidation-reduction reactions.
• Transferases: Used to catalyze transfer of a functional group from one molecule to another.
• Hydrolases: Used to break a large molecule into smaller ones using water.
• Isomerases: Used to catalyze isomerization reactions.
• Lyases: Used to catalyze addition or removal of a small molecule.
• Ligases: Used to catalyze the bonding of two substrate molecules.