Create README.md

This is a dataset with all DBA coding sequences for 13 vertebrae species obtained from ensembl.

The species:

"Homo sapiens", "Vicugna pacos", "Mus musculus", "Cavia porcellus", "Canis lupus familiarisgsd", "Pan paniscus", "Panthera leo", "Electrophorus electricus", "Takifugu rubripes"

README.md

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+---
+tags:
+- biology
+- DNA
+size_categories:
+- 100K<n<1M
+---