Table 2. Codon usage of 13 protein-coding genes of Tremoctopus violaceus mt genome
| Codon | Count | Codon | Count | Codon | Count | Codon | Count |
| UUU(F) | 287 | UCU(S) | 92 | UAU(Y) | 128 | UGU(C) | 57 |
| UUC(F) | 53 | UCC(S) | 46 | UAC(Y) | 38 | UGC(C) | 8 |
| UUA(L) | 301 | UCA(S) | 81 | UAA(*) | 9 | UGA(W) | 80 |
| UUG(L) | 100 | UCG(S) | 11 | UAG(*) | 4 | UGG(W) | 20 |
| CUU(L) | 51 | CCU(P) | 72 | CAU(H) | 47 | CGU(R) | 19 |
| CUC(L) | 28 | CCC(P) | 23 | CAC(H) | 36 | CGC(R) | 3 |
| CUA(L) | 80 | CCA(P) | 28 | CAA(Q) | 42 | CGA(R) | 25 |
| CUG(L) | 11 | CCG(P) | 6 | CAG(Q) | 15 | CGG(R) | 3 |
| AUU(I) | 257 | ACU(T) | 57 | AAU(N) | 123 | AGU(S) | 42 |
| AUC(I) | 77 | ACC(T) | 29 | AAC(N) | 51 | AGC(S) | 9 |
| AUA(M) | 191 | ACA(T) | 58 | AAA(K) | 64 | AGA(S) | 56 |
| AUG(M) | 76 | ACG(T) | 5 | AAG(K) | 33 | AGG(S) | 50 |
| GUU(V) | 110 | GCU(A) | 55 | GAU(D) | 59 | GGU(G) | 73 |
| GUC(V) | 11 | GCC(A) | 19 | GAC(D) | 14 | GGC(G) | 15 |
| GUA(V) | 78 | GCA(A) | 36 | GAA(E) | 53 | GGA(G) | 99 |
| GUG(V) | 56 | GCG(A) | 10 | GAG(E) | 25 | GGG(G) | 55 |
Asterisk indicates termination codon.