VTAI_LAMBD I Tail assembly protein I 223 Gene I protein is involved in the assembly of the initiator complex for tail polymerization. It has not been found in the mature phage. MAATHTLPLASPGMARICLYGDLQRFGRRIDLRVKTGAEAIRALATQLPAFRQKLSDGWYQVRIAGRDVSTSGLTAQLHETLPDGAVIHIVPRVAGAKSGGVFQIVLGAAAIAGSFFTAGATLAAWGAAIGAGGMTGILFSLGASMVLGGVAQMLAPKARTPRIQTTDNGKQNTYFSSLDNMVAQGNVLPVLYGEMRVGSRVVSQEISTADEGDGGQVVVIGR