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Fig. 3. Unrooted phylogram for hh-class genes recreates the accepted
evolutionary relationships among protostomes (Dro-hh; Hro-hh and Pat-hh) and
deuterostomes (all others). Well-supported branches are indicated by numbers
(percentage of 100-replicate bootstrap trials). Abbreviations and accession
numbers as in Fig. 1, plus
chick (Gal-ihh, Q98938 and Gal-shh, Q91035), Xenopus (Xen-chh, Q91610
and Xen-hh4, Q91611) and another zebrafish gene (Dan-ehh, Q98862). See text
for details.