In UniProtKB entries, the topic 'Enzyme regulation' is used to display information about factors that regulate the activity of enzymes, but also of transporters and microbial transcription factors (https://www.uniprot.org/help/enzyme_regulation).

To clarify the situation, we are going to rename this topic to 'Activity regulation'.

For details, please consult https://www.uniprot.org/help/activity_regulation