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Usage of symbols

Usage of symbols - Microbiology Forum

Usage of symbols - Discuss Microbiology Science and Protocols here. Post questions on the study of viruses, fungi, parasites and bacteria here. Microbiology Forum.


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Old 06-22-2012, 06:44 PM
Pipette Filler
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Default Usage of symbols



Dear all,

Anyone here who can tell me what this means (part of a genotype of a yeast): his3Δ1/his3Δ1 leu2Δ0/leu2Δ0

I have always been told that Δ before a gene, means that the gene is gone (knock out mutant).

But what does it mean if it stands at the end (his3Δ) or as in my other example: his3Δ1/his3Δ1 , What does that 1 mean?

I also do not get it why they put his3Δ1/his3Δ1 rather then just his3Δ1 ?

Any advice is welcome.
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