Figure 2: ERK-like expression in Taenia crassiceps. A single band of approximately 112 bp corresponding to ERK was detected in all in vitro treated cysticerci. Unexpectedly, either 17 𝛽 -estradiol or ERK inhibitor treatment significantly induced ERK-like expression, related to control cysticerci. 𝛽 -actin was used as control gene of constitutive expression. Optical densitometry was performed on 2% agarose gel from six independent experiments. Control = Parasites treated with the vehicle where hormone and inhibitors were dissolved; 𝑃 < . 0 5 .