Table 1.

Hematological values in WT and Per2-null mice

All values are expressed as means ± S.D. for 10 male mice/genotype. **, p < 0.01. MCHC, mean corpuscular hemoglobin concentration; HGB, hemoglobin; MCH, mean corpuscular hemoglobin; MCV, mean corpuscular volume; RDW, red blood cell distribution width.

Parameter	WT	Per2-null
RBC (1012/liter)	9.35 ± 0.41	9.13 ± 0.35
Hematocrit (%)	43.2 ± 5.38	41.9 ± 6.64
MCHC (g/liter)	330.7 ± 28.78	317.8 ± 33.2
HGB (g/liter)	143.0 ± 6.64	145.7 ± 6.96
MCH (pg)	15.3 ± 0.32	16.0 ± 2.21
MCV(fl)	47.3 ± 1.58	51.2 ± 1.58**
RDW (%)	35.7 ± 2.53	40.3 ± 1.58**