PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33181455-3 2021 In addition, SP (5 nmol/kg) treatment markedly restored spermatogenesis, improved sperm quality, and increased the number of ZBTB16+ or LIN28+ undifferentiated spermatogonia as well as STRA8+ differentiated spermatogonia in a busulfan-induced non-obstructive azoospermic mouse model. Busulfan 226-234 trefoil factor 2 (spasmolytic protein 1) Mus musculus 13-15