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supplement Tryp muts with other a.a.s?

Lynn S Dahleen dahleen at badlands.NoDak.edu
Mon Jul 25 10:40:31 EST 1994

	I have been attempting to transform yeast using the speroplasting 
method described by Burger and Percival.  My selectable marker is 
growth without Tryp and Ura.  In my last few tries, all my transformed 
(?) colonies are very small.  My question is:  Should I be selecting the 
transformants on minimal media, or can I (should I) supplement the minimal 
media with all the other amino acids except Tryp and Ura.  Also, any 
helpful hints about using this proccedure (or other better proceedure) 
for YAC cloning would be appreciated.  
                                          Dave Horvath
                                          Fargo, ND

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