Table 4.

Ames test results expressed as MR

Compound	Concentration	Revertants per plate	MR
		Bacteria strain TA100
QDs	10 nM	7/96	1.17
	5 nM	8/96	1.33
	2.5 nM	4/96	0.67
	1.2 nM	6/96	1
	0.6 nM	0/96	0
	0.3 nM	0/96	0
QDs-Ind	10 nM	3/96	0.6
	5 nM	2/96	0.4
	2.5 nM	2/96	0.4
	1.2 nM	3/96	0.6
	0.6 nM	0/96	0
	0.3 nM	0/96	0
Ind	43 µM	0/96	0
	21.5 µM	0/96	0
	10.7 µM	0/96	0
	5.4 µM	0/96	0
	2.7 µM	0/96	0
	1.3 µM	0/96	0

Notes: The concentration of Ind tested corresponds to the concentration of peptide present in each sample of QDs-Ind (range 10–0.3 nM).

Abbreviations: QDs, quantum dots; Ind, indolicidin; MR, mutagenicity ratio; QDS-Ind, quantum dots-indolicidin.