CREATE TABLE table_name_19 (yeast_ortholog VARCHAR(255), subpathway VARCHAR(255), genecards_entry VARCHAR(255))
What is the yeast ortholog that has a subpathway of GGR and GeneCards entry CETN2?
    
SQL: SELECT yeast_ortholog FROM table_name_19 WHERE subpathway = "ggr" AND genecards_entry = "cetn2"