Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE protein (institution_id VARCHAR); CREATE TABLE institution (institution_id VARCHAR)
### Question:
How many institutions do not have an associated protein in our record?
### Answer:
SELECT COUNT(*) FROM institution WHERE NOT institution_id IN (SELECT institution_id FROM protein)