Method of preferential labelling of a phycobiliprotein with an aminereactive dye for use in a multiple color assay and product for such use
US5783673A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Oct 10, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S530/807
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for preparing phycobiliprotein/amine-reactive dye conjugates is disclosed in which the conjugates so prepared overcome the energy transfer/fluorescent quenching dilemma encountered in the use of prior art conjugates. A phycobiliprotein, for example, phycoerythrin or allophycocyanin, is conjugated with an amine-reactive dye, for example, Texas Red or carboxyfluorescein succinimidyl ester, in the presence of a selective salt which causes a hydrophobic intramolecular rearrangement of the phycobiliprotein thereby exposing more hydrophobic sites for binding to the amine-reactive dye. The conjugates prepared according to the invention are useful in multiple color fluorescence assays without requiring the use of multiple exciting sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.