Table 2.

Classes of TH-GAL4 flip-out clones that project to the mushroom body.

Type	Cluster	Mushroom body area innervated	Number of samples observeda	Heat shock time
1	PAM	Medial portion of horizontal lobesb	11	Pupal
2	PPL1	α Tip	11	Larval and pupal
3	PPL1	α′ Tip	5	Larval and pupal
4	PPL1	Upper stalk	5	Pupal
5	PPL1	Lower stalk and junction	13	Larval and pupal
6	PPL1	Heel and distal peduncle	14	Larval and pupal
7	PPL2ab	Calyx and ventral portion of lateral horn	4	Larval and pupal
8	PPL2ab	Calyx and entire lateral horn	2	Pupal or late larval

^aSome samples of the PAM and PPL1 clusters contained multiple clones.

^bDifferent subtypes have been observed, including single clones projecting to the tips of the γ lobes, the tips of the β lobes, or areas roughly corresponding to the tips of the β′ lobes. Due to the frequent occurrence of multiple clones and relatively low fluorescence of single cells, we do not have an n ≥ 2 of high quality single clones to confidently identify all subtypes.