Table 1
Sequences of oligonucleotides employed in this work
Name	Sequence
A1: anti-E. coli O157:H7 aptamer	5′-CCGGACGCTTATGCCTTGCCATCTACAGAGCAGG
	TGTGACGG-3′
A2: anti-S. typhimurium aptamer	5′-CCAAAGGCTACGCGTTAACGTGGTGTTGG −3′
R1: random sequence	5′-ATCCATGGGGCGGAGATGAGGGGGAGGAGGGCG
	GGTACCCGGTTGAT-3′

The sequences of specific target bacteria binding aptamers [17] were truncated after prediction of the secondary structure using web-based Vienna RNA software.

Wu et al. Nanoscale Research Letters 2012 7:658   doi:10.1186/1556-276X-7-658