Non-protein part of enzyme is known as :

Step-by-step solution

The enzyme complex (holoenzyme) is made up of two parts i.e., protein part (apoenzyme) and non-protein part (cofactor). Cofactor is of three types - (i) prosthetic group (ii) coenzymes (iii) metal ions Holoenzymes = Apoenzyme + Prosthetic group (Enzyme complex) (Protein part) (Non-protein part).