Table 4. Surfactant homeostasis is not corrected by additional NOS2 genetic ablation.

	Surfactant Fraction
	Small (µg)	Large (µg)	Total (µg)
WT (n = 7)	76±6	148±10	224±15
Sftpd−/− (n = 15)	604±39 * ξ	249±15 * ξ	854±49 * ξ
DiNOS (n = 7)	465±34 * ξ #	233±18 * ξ	698±42 * ξ
NOS2−/− (n = 8)	116±5 #	112±6 #	228±9 #

Phospholipid content of BAL as well as small and large aggregate fractions was determined by the method of Bartlett. Data shown are mean ± S.E.. Statistically significant differences between groups (p<0.05) are indicated as:

^* vs. WT,

^ξ vs. NOS2^−/−,

^# vs. Sftpd^−/− mice.