def mark_validation(institute_id, case_name, variant_id):
    """Mark a variant as sanger validated."""
    institute_obj, case_obj = institute_and_case(store, institute_id, case_name)
    variant_obj = store.variant(variant_id)
    user_obj = store.user(current_user.email)
    validate_type = request.form['type'] or None
    link = url_for('variants.variant', institute_id=institute_id, case_name=case_name,
                   variant_id=variant_id)
    store.validate(institute_obj, case_obj, user_obj, link, variant_obj, validate_type)
    return redirect(request.referrer or link)
Mark a variant as sanger validated.