Scale: centiRay (cR)
CentiRays are not a constant unit, but the value of each
centiray depends on the dose of radiation used
to break the DNA into fragments.
E.g., If two genes are 1 centiRay apart (at a given dose of
radiation), then there is a 1% chance of getting a break
between them.
E.g., 1cR8000 = 1% chance that two things will break apart
at a dose of 8000 rads.
Source: The example above is from the glossary of: Strachan, T. and Read, A.P. 1997. Human Molecular Genetics. New York: John Wiley & Sons.
Conversion of centiRay (cR) --> megabase (Mb) --> kilobase (Kb)
The average Kb length per CentiRay for the cR3000 and cR10000 panels
can be estimated as follows, but keep in mind it provides an average
value for the whole human genome, but the actual ratio can vary
along portions of a chromosome:
GB4: Total cR3000 for the genome is 11524, so:
3,200 Mb/11,524 cR = 0.28 Mb/cR X 1000 Kb/Mb = 280 Kb/cR
G3: Total cR10000 for the genome is 125853, so:
3,200 Mb/125,853 cR = 0.025 Mb/cR X 1000 Kb/Mb = 25 Kb/cR
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