Table 1.

Efficiency of IL-9-independent growth after transfection of TS1 cells with MRG1 or mIL-9 plasmid

Plasmid	No. of cells	Agar cloning in
		−mIL-9	+mIL9
pMRG1	105	64.7  ±  5.7	1.0  ±  0.0
	106	625.7  ±  18.9	9.7  ±  0.6
	107	5,874.7  ±  61.6	99.0  ±  2.7
pmIL-9	105	59.3  ±  7.8	0.67  ±  0.6
	106	596.3  ±  10.5	11.7  ±  0.6
	107	5,927.0  ±  77.2	291.3  ±  10.0
pCDNA3	106	508.0  ±  5.6	0
	107	5,138.7  ±  105.0	<0.66  ±  1.6
None	106	549.7  ±  22.9	0
	107	5,606.3  ±  20.6	<0.33  ±  0.6

Mean ± SEM of clones from three plates grown with G418 (pMRG1-, pmIL-9-, or pCDNA3-transfected cells) or without G418 (untransfected cells).