Table 2. Genes encoding PTPs displaying differential expression during primary osteoblast differentiation.

Given are the Affymetrix signal intensities at two stages of differentiation and the signal log ratios (SLR).

Gene	day 5	day 12	SLR
Ptprz1	18.7	590.3	5.1
Ptpro	15.7	54.2	1.8
Ptprc	60.9	134.1	1.2
Ptpn18	47.0	14.1	1.2
Ptpn20	25.9	64.6	1.2
Ptprt	5.2	10.7	1.1
Ptpn6	42.2	53.4	0.9
Ptpn2	1219.1	1735.0	0.4