TABLE 1.

PTP levels of CVID PBMCs stimulated with anti-human IgM antibody^a

Patient	Densitometry units
	P	N	P/N ratio
P1	110,983	161,778	0.68
P2	294,174	643,100	0.45
P3	362,861	372,472	0.97
P5	198,263	300,583	0.65
P6	265,215	226,370	1.17
P7	204,904	196,402	1.04
P8	727,849	1,102,152	0.66
P10	334,680	594,231	0.56
P11	413,190	465,654	0.88
P12	331,587	465,654	0.71
P13	433,695	683,251	0.63

^aThe results represent the sum of densitometric units of all the bands in each lane. Each row represents the results of one experiment carried out with the cells of one CVID patient (P) and one normal donor (N) after stimulation for 10 min with anti-human Ig antibodies. These data represent one of two repeated experiments. Patients with a P/N ratio of <0.74 were statistically found to be “PTP defective.”