Other forms of cap-independent translation elements (CITE) exist (primarily in plant viruses from the Luteovirus, Necrovirus, Dianthovirus and Umbravirus genera of plantviruses, but also in some host mRNA; notably many heat shock mRNA lack a 7mG cap but are still translated). The general purpose of BTE and these other CITE's is to get the ribosome to begin translation without the 7mG cap.
Other forms of cap-independent translation initiation (CITE) exist, primarily in plant viruses from the Luteovirus, Necrovirus, Dianthovirus, and Umbravirus genera of plantviruses, as well as in some host mRNA; notably many heat shock mRNA lack a 7mG cap but are still translated.