The program illustrates the various functional units of the lac operon. The animations show the process of transcription and the control effects exercised during the presence and absence of lactose and glucose. The conformational changes that occur on the binding of allolactose and c AMP to the repressor and CAP respectively are illustrated together with the effects of these changes on binding to the operator and CAP site. The program ends with a twenty question quiz to test the reader's understanding of the subject.
Remedial information is supplied when the quiz has been completed and marked.