References and Notes

not for IFT81 alone could help ensure that tubulin cargo only binds in the context of properly as-sembled IFTcomplexes.Because tubulin constitutes the backbone of all cilia, it makes sense that the tubulin has a dedicated cargo-binding site on the IFT core complex (23). We hypothesize that, al-though abundant ciliary cargo proteins such as tubulin may undergo IFT via dedicated transport modules, less abundant ciliary proteins are likely to compete for generic cargo-binding sites on the IFT complex