PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22291013-5 2012 Consistent with our previous overexpression studies, we found that H(2)O(2)-induced superoxide production by primary sperm cells was mediated by the non-receptor tyrosine kinase c-Abl. Superoxides 84-94 ABL proto-oncogene 1, non-receptor tyrosine kinase Homo sapiens 178-183