From owner-celegans@net.bio.net Thu Nov 03 22:00:00 1994
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From: kayne@caltech.edu (paul kayne)
Newsgroups: bionet.celegans
Subject: Re: killing adults
Date: 4 Nov 1994 20:32:41 GMT
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In article <1C999B65380@charon.biochem.wisc.edu>
FERGUSON@BIOCHEM.WISC.EDU writes:

> I am wondering if there is any chemical or physical procedure I could 
> use to kill adult worms without killing embryos.  I am trying to isolate 
> a large quantity (from liquid) of homozygous deficiency embryos.  I 
> would like to avoid bleach treatment if possible since even short bleach 
> treatments will kill a fraction of the embryos and contaminate my prep.
> 
> Thanks-
> Kim Ferguson


i have succesfully used nytex filters to obtain specific stages. the
exact condition depend on the particular strain, but embryos will go
through a 15 um filter and adults won't. it would be helpful to do this
with synchronized cultures, as it is sometimes difficult to separate
adjacent stages.

also a preselection can be useful, that is a 1 X g spin - putting all
the worms in M9 in an orange cap tube and letting them sit for 2-10
minutes. adults will sink much faster than other stages.

paul kayne
kayne@caltech.edu

.