Hi Nora,

The doses for XO is 90/mg/kg/day SQ.  XO is not as bright as calcein, if animals are forming bone very slowly you may want to consider injecting for 2 days in a row.  

Mary

>>> Nora Fox <nefox@leland.Stanford.EDU> - 6/23/1999 4:09 PM >>>
First, thanks to all who responded to my question on this earlier.

We are interested in using xylenol orange as a fluorochrome label for bone.
Two references give very different doses, specifically, 90 mg/kg & 90
ng/kg.  Has anyone ever used this label?  Does anyone know what the correct
amount is?

Thanks in advance.

Nora