Table 2

Uptake of benzylpenicillin and glycylsarcosine by freshly isolated brain capillary endothelial cells

Tracer	Condition	Tracer/Sucrose Ratio	N	p Value^2-a
		% of control
[³H]Benzylpenicillin	pH 6.5	100^2-b	5
	Ceftibuten (0.66 μM), pH 6.5	139.6 ± 5.4	5	NS
[¹⁴C]Glycylsarcosine	pH 6.5	100^2-b	5
	Ceftibuten (0.66 μM), pH 6.5	97.9 ± 1.6	5	NS

Values are means ± SE of N experiments.
↵2-a By two-tailed Student’s t test. NS, statistically not significant (p > 0.05, adjusted by Bonferroni’s correction for multiple comparisons).
↵2-b Control value, which was defined as 100%.