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

 The mouse alpha A - CRYBP1 gene specifies a 2 , 688 - amino acid protein with 72 % amino acid identity to its human homologue , PRDII - BF1 .
PRDII - BF1

 This action could be antagonized by aminophylline , a competitive antagonist on P1 purinoceptors .

P1 purinoceptors