tokens: This hypothesis was tested by introducing mutations at each of the three histidine pairs , the H382-X2-H385 pair , the H411-X2-H414 pair and the H430-X5-H436 pair , which constitute the histidine rich region near the C terminus of gp17 .
folded_tokens: this hypothesis be test by introduce mutation at each of the three histidine pair , the h382-x2-h385 pair , the h411-x2-h414 pair and the h430-x5-h436 pair , which constitute the histidine rich region near the c terminus of gp17 .