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Tet_C: C-terminus of ribosomal protection proteins Tet(M) and Tet(O). This domain has homology to the C terminal domains of the elongation factors EF-G and EF-2. Tet(M) and Tet(O) catalyze the release of tetracycline (Tc) from the ribosome in a GTP-dependent manner thereby mediating Tc resistance. Tcs are broad-spectrum antibiotics. Typical Tcs bind to the ribosome and inhibit the elongation phase of protein synthesis, by inhibiting the occupation of site A by aminoacyl-tRNA.