Enhancing uric acid electrochemical detection with copper ion-activated mini protein mimicking uricase within ZIF-8: response surface methodology (RSM) optimization by Abdul Aziz, Siti Fatimah Nur, Hui, Ong Sin, Salleh, Abu Bakar, Normi, Yahaya M., Yusof, Nor Azah, Ashari, Siti Efliza, Alang Ahmad, Shahrul Ainliah