Fig. 1.

Mean ± SEM for time spent awake (a), in non-rapid eye movement sleep (NREM; b), and rapid eye movement sleep (REM; c) over a 24-h period in Townes mice with the sickle cell phenotype SS (n = 6) and Townes mice with the sickle cell trait AS (n = 6). Statistical differences determined by two-tailed unpaired Student’s t test