June 16, 1999

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Two new trees have been made with CYP4 sequences as the main content.  These
trees
illustrate the difficulty of maintaining a sensible nomenclature when families
get very large.
There are some inconsistencies.  The 4D subfamily has been split over time into
two
different clusters of sequences.  Cyp4p should probably be in a separate family.
The 4F
subfamily has also been split.  I have started using double letters as in
Cyp4aa1 for new
subfamilies because the single letters have all been used.  Please go the the
Drosophila
section to see these new trees.