Which two animals are most related regarding to amino acids?

Humans and chimpanzees are the two animals most closely related in terms of amino acids, sharing about 98-99% of their DNA. This genetic similarity translates to a high degree of similarity in protein sequences, as amino acids are the building blocks of proteins. Other closely related species, such as gorillas and orangutans, also show significant similarities, but humans and chimpanzees stand out as the closest.