Microchip-based homogeneous immunoassay using a cloned enzyme donor

Tomoya Tachi, Noritada Kaji, Manabu Tokeshi, Yoshinobu Baba

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


We have realized a cloned enzyme donor immunoassay (CEDIA) on a microchip in 96 s. CEDIA is a homogeneous immunoassay, based on the bacterial enzyme β-galactosidase, which was genetically engineered into two inactive fragments: an enzyme donor and an enzyme acceptor. A model analyte was theophylline, and the detectable concentration range was from 0 to 40 μg mL-1. Our CEDIA using a microfluidic device was very simple and rapid, unlike microchipbased heterogeneous immunoassays and CEDIA on a well-type microchip.

Original languageEnglish
Pages (from-to)149-151
Number of pages3
Journalanalytical sciences
Issue number2
Publication statusPublished - 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry


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