FIG. 3.

Phylogenetic analysis of Δ7SR, sterol Δ24 reductase (Δ24SR), and sterol Δ14 reductase. The phylogenetic tree was prepared by using the GENETYX version 7.0.3 (Genetyx Co.). For each numbered sequence, the EMBL (em) or TrEMBL (tr) accession no. is as follows: sequence 1, em, AF048704; sequence 2, em, AF480070; sequence 3, em, AF256535; sequence 4, tr, Q59LS4; sequence 5, em, M99419; sequence 6, tr, Q41852; sequence 7, tr, Q4WW43; sequence 8, em, S58126; sequence 10, em, AB016800; sequence 13, em, AY653733; and sequence 15, em, AP005514. The gene accession numbers of sequences 9, 11, 12, and 14 are noted in the text.