Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_18 ( yeast_ortholog VARCHAR, mouse_ortholog VARCHAR )

### Question ###
What is the yeast ortholog of mouse ortholog MMS19?

### Accurate SQL ###

SELECT yeast_ortholog FROM table_name_18 WHERE mouse_ortholog = "mms19"