Vertebrates, lower animal difference from

Bile alcohols found in lower vertebrates are polyhydric derivatives of cholestane (C27), 27-norcholestane (C26), 26,27-dinorcholestane (C25) or cholane (C24). The trivial names of the bile alcohols include as a prefix part of the Latin name of the genus of the animal from which they were first isolated. When both isomers differing in the configuration at C-5 are known, the prefix 5a or 5)8 is then used with the... 

In lower vertebrates, as in mammals, Dmrtl mRNA was also expressed in adult ovarian tissue of several fish species (Table 2). Moreover, in addition to the testis-specific tDmrtl, the other DM domain gene (tDMO) was isolated from one teleost fish, the tilapia (Guan et al., 2000). tDMO (tilapia DM domain gene in Ovary), the expression of which is limited to the ovary in adult animals, is the first-described female-sp>ecific DM domain gene in vertebrates. In contrast to the alternatively sphced male and female invertebrate doublesex (Burtis Baker, 1989), tDmrtl and tDMO cDNAs ap>p)ear to be encoded by two different genes that share little homology outside the DM domain... 

---