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| PubMed | Entrez | BLAST | Genome | Taxonomy | Structure |
| or |
| root (105 nodes) |
 eukaryotes (104 nodes) |
 animals (100 nodes) |
| chordates (27 nodes) |
| tunicates (17 nodes) |
| vertebrates (6 nodes) |
| lizards & snakes (3 nodes) |
| salamanders (1 node) |
 other vertebrates (1 node) |
| lancelets (3 nodes) |
| arthropods (25 nodes) |
| hexapods (12 nodes) |
| insects (7 nodes) |
| lice (3 nodes) |
| bugs (2 nodes) |
| moths (1 node) |
| other hexapods (4 nodes) |
| arachnids (7 nodes) |
| mites & ticks (6 nodes) |
| spiders (1 node) |
| crustaceans (5 nodes) |
| molluscs (18 nodes) |
| bivalves (16 nodes) |
| gastropods (1 node) |
| nematodes (7 nodes) |
| flatworms (6 nodes) |
| sponges (4 nodes) |
| anthozoans (3 nodes) |
| stony corals (1 node) |
| other anthozoans (2 nodes) |
| sea urchins (2 nodes) |
| segmented worms (2 nodes) |
| hemichordates (1 node) |
| other animals (2 nodes) |
| flowering plants (2 nodes) |
| red algae (1 node) |
| brown algae (1 node) |
| other (1 node) |
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