Questions tagged [units]

Units commonly encountered in biology: their definitions, usage, conversion.

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Meaning of 5’–3’ in relation to ORFs

I was reading a paper in the journal Molecular Basis of Disease, which stated: The ORFs are arranged as replicase, and protease and major S, E, M, and N proteins which follows a typical 5’—3’ order ...
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Question on kilobase - packaging of genomic material in viruses

I have been looking up some information of SARS. Wikipedia says it is 29.7kb in length while 1kb is around 300nm. However, the microscope image on wiki shows the virus size <100nm. It doesn't make ...
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Definition of a Katal (unit of enzyme activity)

I am very confused about what one 'Katal' actually is. From Wikipedia, "The katal is not used to express the rate of a reaction; that is expressed in units of concentration per second (or moles per ...
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What is an inclusion forming unit?

What is inclusion forming unit load? I found it when reading this article. What does this measure and what information can be gained form it? Does this represent the amount of bacteria within a ...
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720 views

Where do I purchase this Trypsin?

I am currently on the lookout for Trypsin, but I have some trouble finding something that is fairly cheap, ships to Europe and is equivalent to this Trypsin: http://www.emsdiasum.com/microscopy/...
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how to quantify toxicity

When going through this link, Table 1, what are the numbers mentioned there? How is one quantifying toxicity?
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Convert flux value in nmol/min/mg protein to nmol/min/cell?

This is a question about unit conversion. I found an experimental measurement of the saturation uptake of glucose in yeast: $$V_\textrm{max} \approx 650 \textrm{nmol}/\textrm{min}/\textrm{mg protein}$$...