Two new trees have been made with CYP4 sequences as the main content. These
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
different clusters of sequences. Cyp4p should probably be in a separate family.
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
section to see these new trees.