File:Hydropathy Molar Volume Genetic Code 2.png

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A codon position is biased if the elliptical trace is: 1) not centered on the center of the (square) graph frame, and / or 2) contains a smaller-than-random volume. First position - dashed. Second position - solid.

The strongest components (bias) for the encoding of anino acid residues are, in order:

C in 2nd position = small size, medium hydropathy

U in 2nd position = average size, hydrophobic

A in 2nd position = average size, hydrophilic

U in 1st position = not hydrophilic

The y-axis is accurate (cubic Angstroms), but the x-axis could have some error from estimates of hydropathy.

Redrawn from Figure 4 in http://www.complexity.org.au/ci/vol01/fullen01/html/

which attributes the graph to Yang, M. M., W. J. Coleman and D. C. Youvan. 1990. In Reaction Centers of Photosynthetic Bacteria. M.-E. Michel-Beyerle. (Ed.) (Springer-Verlag, Germany) p209-218; listed by Google at [1]

Date 30 May 2008 Source doug youvan

Author Doug Youvan
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Source Own work
Author Frank Layden

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