[baikuza]

greeting.

i have read my book. it said that ...we can said that enzyme always  protein. because we do not find any compound exept protein that cunstruct enzyme...
is this statement still valid?

i read a book. but i'd like to get the oppinion from the people in this forum. so... i want to ensure my self about this.

[Mitch]

In a minority of cases enzymes can also be RNA based(ribozymes).

[billnotgatez]

These are the five dictionary definitions found on line.

enzyme - Any of numerous proteins or conjugated proteins produced by living organisms and functioning as biochemical catalysts.

enzyme - Any of numerous proteins or conjugated proteins produced by living organisms and functioning as specialized catalysts for biochemical reactions.

enzyme - any of numerous complex proteins that are produced by living cells and catalyze specific biochemical reactions at body temperatures

enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions

enzyme - <biochemistry> A protein molecule produced by living organisms that catalyses chemical reactions of other substances without itself being destroyed or altered upon completion of the reactions.

Enzymes are classified according to the recommendations of the Nomenclature Committee of the International Union of Biochemistry. Each enzyme is assigned a recommended name and an Enzyme Commission (EC) number.

They are divided into six main groups, oxidoreductases, transferases, hydrolases, lyases, isomerases and ligases.