Re: Units, Conversion Factors, CRP

[Guest guest]

Hi Rodney,

Micrograms per milliliter are already in metric form. I don't know why you

would want to convert to moles. You would need to know the molecular weight of

C reactive protein to do it. Thus you would need to understand the amino acids

in CRP and the shape of the protein. Should you be able to find that

information, you can calculate the molecular weight here:

http://www.bioinformatics.org/sms2/protein_mw.html

Diane

>

> Hi folks:

>

> Quick question, and it ought to be a simple one:

>

> Can anyone tell me the 'metric' units for HS c-reactive protein, and what the

conversion factor is from US to metric units, please?

>

> In what we here call 'The WUSTL Study' CRP was measured in micrograms per

millilitre. The average level in the CR practitioners was 0.3 in those units.

It would be helpful to know how to convert that number to its metric equivalent,

which presumably uses moles instead of grams.

>

> TIA.

>

> Rodney.

>

[Guest guest]

Hi Diane:

Most of the medical units quoted up here use moles instead of grams. I suppose

the logic of that is that it relates directly to the number of molecules in the

sample whereas a unit using grams does not. Vitamin D here is quoted in nmol/L,

for example. Or for other tests pmol/L - but I do not remember which test.

It just comes down to using 'normal solutions' as a basis for assessing things.

My reason for asking is that I want to be sure I know how the CRP number I had

reported in my test results a couple of years ago relates to the numbers in the

WUSTL Study. It has only now occurred to me that my numbers may not have been

in the same units as the WUSTL data. And I have had difficulty finding out how

to convert. As for the molecular weight of CRP, I saw today a graphical

representation of the structure of CRP, and it looks quite large and complicated

with a five-petalled flower appearance. fwiw.

Rodney.

> >

> > Hi folks:

> >

> > Quick question, and it ought to be a simple one:

> >

> > Can anyone tell me the 'metric' units for HS c-reactive protein, and what

the conversion factor is from US to metric units, please?

> >

> > In what we here call 'The WUSTL Study' CRP was measured in micrograms per

millilitre. The average level in the CR practitioners was 0.3 in those units.

It would be helpful to know how to convert that number to its metric equivalent,

which presumably uses moles instead of grams.

> >

> > TIA.

> >

> > Rodney.

> >

>