 Solution

The N-terminal 1–29 fragment and the 1–15 fragment inhibit invadopodium formation. Their values are around one fifth of the control, and gelatin degradation is strongly reduced too. Full-length t-SNARE, empty vector and the 15–29 fragment remain near control values. The images agree: the inhibitory fragments leave much more intact gelatin beneath the cells. The corresponding published syntaxin-4 study links this phenotype to impaired cargo trafficking.^[ref]