ˈɔːlsoʊ, dˈɪfɹənt kɚɹˈɛkʃən fˈæktɚz ɑːɹ nˈiːdᵻd fɔːɹ dˈɪfɹənt pɹˈoʊtiːnz tʊ ɐkˈaʊnt fɔːɹ dˈɪfɹənt ɐmˈiːnoʊ ˈæsɪd sˈiːkwənsᵻz.
Also, different correction factors are needed for different proteins to account for different amino acid sequences.