Eight pairs of human-mouse orthologs with identical protein sequences but no overlapping GO annotations based on co-study papers.

1 Experimental systems may mean organisms or cell lines.
2 Bias/error indicates (1) experimental bias (i.e., different functional aspects were examined for orthologs), (2) inferred function (i.e., function in a species is inferred from that in a related species), or (3) annotation error (i.e., mistake in annotation).