Subject: 	e1 versus e4
Hi--
Jim Kennison brought the fact to my attention that most of the stocks 
in the Bloomington collection that we say are marked with e1 are 
probably marked with e4.  According to Loring Craymer in 
http://flybase.org/reports/FBrf0063385.html, e1 was isolated on 
In(3R)C and the inversion and mutation were never successfully 
separated.  We usually choose allele 1 as the default when we write 
genotypes of alleles that have been around a long time and were 
traditionally denoted without a superscripted allele 
number.  Unfortunately, this was the wrong choice with ebony.  For 
all practical purposes, e1 is now a synonym for e4.  We think it 
would create too much confusion to change the genotypes of several 
hundred stocks at this point.  Nevertheless, it would be good to 
include a statement similar to the following in the e1, e4 and 
In(3R)C entries:
"According to Craymer in FBrf0063385, e1 was isolated on In(3R)C 
and was never successfully separated from it.  Most ebony alleles 
denoted simply as "e" without a specific allele designation can be 
traced back to Muller's e4.  Most ebony mutations in Stock Center 
stocks designated as e1 are probably e4."
Thanks!
Kevin