{HEAD ~ Each binding oligonucleotide} has a first portion which has a sequence complementary to at least a portion of the sequence of oligonucleotides on the nanoparticles and {TAIL ~ a second portion} which has a sequence complementary to the sequence of a portion of a nucleic acid to be detected 
{ HEAD ~ Each binding oligonucleotide } has a first portion which has a sequence complementary to at least a portion of the sequence of oligonucleotides on the nanoparticles and { TAIL ~ a second portion } which has a sequence complementary to the sequence of a portion of a nucleic acid to be detected
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH