มีเอ็นไซม์กี่ตัวที่ไม่มีปฏิกิริยาโต้ตอบ?
How many enzymes do not have any interactions?
df_interaction = pd.DataFrame({'id': [], 'enzyme_id': []}); df_enzyme = pd.DataFrame({'id': [], 'enzyme_id': []})
df_enzyme[~df_enzyme['id'].isin(df_interaction['enzyme_id'])].shape[0]