24% of the chimpanzee genome does not align with the human genome, and so cannot be directly compared. There are 3% further alignment gaps, 1.23% SNP differences, and 2.7% copy number variations totaling at least 30% differences between chimpanzee and "Homo sapiens" genomes. On the other hand, 30% of all human proteins are identical in sequence to the corresponding chimpanzee proteins.