---
layout: rule
id: GORULE:0000049
title: "If the annotation has 'contributes_to' as its qualifier, verify that at least one annotation to GO:0043234 (protein complex), or one of its child terms exists"
type: report
fail_mode: soft
status: approved
contact: "go-quality@lists.stanford.edu"
implementations:
---
Implemented in P2GO.
The 'contributes to' qualifier can only be applied to proteins belonging to complexes, so any gene product with a MF annotation using the 'contributes to' should also be annotated to a child of protein complex.