Sure, you could express it in yoctograms (or the mass of IGF-1 in
zeptograms), Michael. But why would you want to?
In a way, the dalton (Da, spelled out name starts in lowercase) is
somewhat analogous to but opposite the astronimical unit u_a.
One astronomical unit equals approximately 150 Gm.
One dalton equals approximately 1.660 540 yg.
Jim
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James R. Frysinger
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On 2013-04-08 20:29, Michael Payne wrote:
Interesting Unit at http://en.wikipedia.org/wiki/Insulin-like_growth_factor_1
forth paragraph down:
IGF-1 consists of 70 amino acids in a single chain with three intramolecular
disulfide bridges. IGF-1 has a molecular weight of 7,649 daltons.
There is another page on Daltons http://en.wikipedia.org/wiki/Dalton_%28unit%29
A unit accepted for use with SI, seems with the prefixes we have, some sub
unit of a gram would have been equally good. Or is this something like the
Astronomical unit on the other end of the scale?
Michael Payne
