Alignment of SNORD87 RNA genes. Conserved elements are marked with lines above the alignment. A fragment of 28S rRNA complementary to the antisense element in SNORD87 is given below the alignment. The G-T complementarity is marked with dots. SNORD87 sequences are given for the following vertebrates: human (Homo sapiens), dog (Canis familiaris), mouse (Mus musculus), rat (Rattus norvegicus), cow (Bos taurus), opossum (Monodelphis domestica), platypus (Ornithorhynchus anatinus), chicken (Gallus gallus), lizard (Anolis carolinensis), frog (Xenopus tropicalis), fugu (Takifugu rubripes), and zebrafish (Danio rerio).