Fig. 4. Functional dissection of cb unc-47 enhancer to identify element(s) responsible for expression in SDQ (L, R). +, strong and consistent expression in particular cells; -, complete lack of expression. (D, V) indicates weak and inconsistent expression of the proximal enhancer in RME (D, V) cells. Note that SDQ (L, R) are the only cells, expression in which is not activated by either of the two shorter enhancer fusion genes.