Table 2.

Cartilage and skeletal defects in traf4^−/− adult mice

Phenotype	Incidence in Traf4+/+	Incidence in Traf4−/−	% −/−
Tracheal abnormalities	0/14	35/35	100
TR1 to TR3	0/14	5/35	14
TR1 to TR4	0/14	18/35	51
TR1 to TR5	0/14	10/35	29
TR1 to TR6	0/14	2/35	6
Ribcage abnormalities	0/14	6/35	17
Spina bifida	0/14	14/35	40

TR, tracheal rings. %, percentage of traf4^−/− mice exhibiting abnormalities.