On Wed, 20 Aug 1997, Harvey J. Karten, M.D. wrote:

> Does anyone know of a source for CY-7 or dyes in a similar range
> (Excitation ca. 740, Emission ca. 780), water soluble?
>
> Amersham listed it in a recent brochure, but are being cryptic about
> availability, implying that they have licensed it to some other company.
> We are trying to get hold of some for cell filling of retinal neurons,
> in order to avoid damage by visible light.

Amersham doesn't seem to have their act together regarding the
ethylenediamine conjugates of the cyanine dyes.  Our recent experience was
that they first said that they couldn't sell them, but then, after talking
to several layers of Supervisors, it finally turned out that they would
(although their minimum order is BIG).

Keep trying.  Somebody will finally figure out that you want to give them
money....

Good luck!

Martin Wessendorf