Table 1. Suppression of PEV and TPE by cloned Su(var) genes.

Gene	Allele	Mutation	PEV	TPE
Su(var)3-9	3-906	null	+++	++a
	3-91	R493Q (SET domain)	+++	++b
	3-92A5	P element insertion	+++	−
	3-9309	C462Y (preSET domain)	+++	++
	3-9311	G521D (SET domain)	+++	++
	3-9318	S616L (postSET domain)	+++	+
	3-9324	C428Y (preSET domain)	+++	−
	3-9325	P582Q (SET domain)	+++	+
	3-9330	D536N (SET domain)	+++	+++
	3-9376	C421S (preSET domain)	+++	+
Hdac1	Hdac1303	C98Y	+++	+
	Hdac1313	R30C	+++	+
	Hdac1326	P204S	+++	+++
abo	abo	Point mutation	+	−b
HP1a	Su(var)2-55	Point mutation	+++	−c
	Su(var)2-54	Point mutation	+++	−
	Deficiency	Df: 28E4-7; 29B2-C1	+++	−b
puc	puc	P element insertion	+++	−b
Su(var)2-10	Su(var)2-102	Point mutation	+++	++b
	Su(var)2-10	Df: 45A6-7; 45E2-3	++	++b
Su(var)3-7	Deficiency	small deficiency	+++	−a
	Deficiency	Df: 87E1; 87F12	+++	+b

Unless otherwise indicated mutations were generated in this laboratory.

^agift from G. Reuter.

^bBloomington Stock Center.

^cgift from J. Mason.