<P> In biology , the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction . The active site consists of residues that form temporary bonds with the substrate ( binding site ) and residues that catalyse a reaction of that substrate ( catalytic site ) . Although the active site is small relative to the whole volume of the enzyme ( it only occupies 10 ~ 20 % of the total volume ) , it is the most important part of the enzyme as it directly catalyzes the chemical reaction . It usually consists of three to four amino acids , while other amino acids within the protein are required to maintain the protein tertiary structure of the enzyme . </P>
<P> In biology , the active site is the region of an enzyme where substrate molecules bind and undergo a chemical reaction . The active site consists of residues that form temporary bonds with the substrate ( binding site ) and residues that catalyse a reaction of that substrate ( catalytic site ) . Although the active site is small relative to the whole volume of the enzyme ( it only occupies 10 ~ 20 % of the total volume ) , it is the most important part of the enzyme as it directly catalyzes the chemical reaction . It usually consists of three to four amino acids , while other amino acids within the protein are required to maintain the protein tertiary structure of the enzyme . </P>
where does the enzyme attach to the substrate
where does the enzyme attach to the substrate
the active site
the active site