Table 1.

Attachment of precursor cells to substrate-coated L1 in relation to attachment to the PLL substrate

	% of PLL control
Concentration of L1 in the coating solution	12 hr	24 hr
3 μg/ml	97.3 ± 6.2	93.8 ± 6.5
6 μg/ml	101.2 ± 5.5	98.0 ± 5.8
9 μg/ml	96.0 ± 6.7	107.5 ± 5.7
12 μg/ml	104.7 ± 7.3	101.9 ± 9.4
15 μg/ml	91.8 ± 6.4	92.2 ± 8.3

Attachment of precursor cells to substrate-coated L1 at different concentrations 12 and 24 hr after plating in the presence of growth factors. No significant differences were detected between the two substrates at the two time points. Percentages show numbers of attached cells in relation to the PLL substrate, which was set to 100%.