TABLE 1.

Reduced recovery of bone marrow-derived, Syk-deficient macrophages after culture on plastic petri dishes^a

Expt	No. of wild-type macrophages recovered/106 bone marrow cells	No. of Syk−/− macrophages recovered/106 bone marrow cells
1	3.5 × 105	7.1 × 104
2	2.6 × 105	1.1 × 105
3	4.2 × 105	3.1 × 104
4	3.7 × 105	7.1 × 104
5	9.2 × 105	1.6 × 105
Mean ± SD	4.7 × 105 ± 2.6 × 105	8.8 × 104 ± 4.8 × 104

^aThe values represent the recovery of macrophages after a 10- to 12-day culture period in the presence of M-CSF.