A new 68 sequence tree with the CYP4 family is given. This has 63 4 Family sequences, and 5 additional sequences. The 48 family and the CYP4P subfamily are at a boundary between the insect cluster and other animal CYP4 members. On earlier versions of this tree they fell outside the 4 cluster. Here they are just inside. A 4 family tree with emphasis on insects August26, 1999[PDF]