In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 We have previously demonstrated that pyrene in diesel - exhaust particles ( DEP ) has an adjuvant activity on immunoglobulin E ( IgE ) antibody production in mice immunized with Japanese cedar pollen allergen ( JCPA ) or ovalbumin ( OA ) intraperitoneally .
immunoglobulin E

 We have analyzed the role of the HU protein in invertasome assembly when the enhancer is located at variable positions close to one of the recombination sites .
HU protein

 The H5 mutants were : DH5 ( all amino acids in D configuration ) and H5F ( where all His are replaced by Phe at positions 3 , 7 , 8 , 15 , 18 , 19 , 21 ) .

H5 mutants