Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2261-8-21/MediaObjects/12872_2008_Article_201_Fig2_HTML.jpg)
Contractile responses elicited by cumulative application of sarafotoxin 6c in non-cultured segments of human internal mammary arteries in the absence (control) and presence of 0.1 μmol/l BQ788. The results are shown as mean values ± S.E.M of six experiments. Statistical analyses of the maximum contraction, comparing control with BQ 788, was performed using Student's t-test, where P < 0.05 (*) was considered significant.