PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 25568362-10 2015 Additionally, MSTN significantly affected the proportion of pubertal heifers by the start of the breeding season (P < 0.05) with the Leu allele additively decreasing the proportion pubertal; however, this did not result in a delay in conception or a decrease in pregnancy rates during the first breeding season (P > 0.15). Leucine 136-139 myostatin Bos taurus 14-18