Send to

Choose Destination
See comment in PubMed Commons below
Proc Natl Acad Sci U S A. 2008 Jun 10;105(23):7988-92. doi: 10.1073/pnas.0711421105. Epub 2008 Jun 3.

Label-free and dynamic detection of biomolecular interactions for high-throughput microarray applications.

Author information

  • 1Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215, USA.


Direct monitoring of primary molecular-binding interactions without the need for secondary reactants would markedly simplify and expand applications of high-throughput label-free detection methods. A simple interferometric technique is presented that monitors the optical phase difference resulting from accumulated biomolecular mass. As an example, 50 spots for each of four proteins consisting of BSA, human serum albumin, rabbit IgG, and protein G were dynamically monitored as they captured corresponding antibodies. Dynamic measurements were made at 26 pg/mm(2) SD per spot and with a detectable concentration of 19 ng/ml. The presented method is particularly relevant for protein microarray analysis because it is label-free, simple, sensitive, and easily scales to high-throughput.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Support Center