The following information accompanied a stock donated to the Bloomington Stock Center by Jeanne Rhea and Michael Bender, University of Georgia.
In the P{amon-GAL4.R} construct, amontillado regulatory sequences drive expression of GAL4.
P{amon-GAL4.R}91D is a homozygous viable and fertile, second chromosome insertion.
-- 
Kevin Cook, Ph.D.
Bloomington Drosophila Stock Center
Indiana University
http://flystocks.bio.indiana.edu