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Hi Citizens:

Try not to laugh.

I have an embarrassingly simple MAD phasing question:

Why is it that F" in this picture isn't required to be vertical (purely imaginary)?

http://www.doe-mbi.ucla.edu/~sawaya/tutorials/Phasing/phase.gif

(Similarly in the Harker diagram of the intersection of phase circles, one sees this.)

I had a student ask me and I realized that there is this fundamental gap in my understanding.

Many thanks in advance.

-- Bill




William G. Scott
Professor
Department of Chemistry and Biochemistry
and The Center for the Molecular Biology of RNA
228 Sinsheimer Laboratories
University of California at Santa Cruz
Santa Cruz, California 95064
USA

phone:  +1-831-459-5367 (office)
             +1-831-459-5292 (lab)
fax:        +1-831-4593139  (fax)