The ABC model of flower development describes the development of floral organs in relation to various classes of homeotic (home-ee-AW-tick) genes. In addition to the ABC type genes are the D and E type genes, which are said to play a role in ovule and verticil (VERT-uh-sull) development. One such D type gene is floral binding protein 7, or FBP7. What specific gene family do FBP7 and many other floral organ identity genes belong to?