PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21157032-4 2011 We used these mice to test whether 17alpha-estradiol (17alphaE2), a less feminizing and non-carcinogenic enantiomer of 17beta-estradiol, protects against this CA1 neuron loss. alfatradiol 35-52 carbonic anhydrase 1 Mus musculus 159-162