en ایمنی شناسی Immunology مقالات اصلی Original Article <div style="text-align: justify;"><strong>Background:</strong> Sex selection of sperm by separating X- and Y-chromosome bearing spermatozoa is critical for efficiently obtaining the desired sex of animal offspring in the livestock industry. The purpose of this study was to produce a goat polyclonal antibody (pAb) against the bovine Sex Determining Region Y<br> chromosome (bSRY) to separate female- and male-bearing spermatozoa.<br> <br> <strong>Methods:</strong> To produce a goat polyclonal antibody against bSRY, a female goat was subcutaneously immunized with 27 kDa of recombinant bSRY (rbSRY) protein as the antigen. The anti-bSRY pAb was purified by ion-exchange chromatography. The purity of the pAb was determined using the SDS-PAGE<br> method. The biological activity of the anti-bSRY pAb was examined using PCR to assess the binding affinity of pAb for the bSRY antigen and commercially sexed bull sperm.<br> <br> <strong>Results: </strong>The total amount of purified anti-bSRY pAb was approximately 650 mg/goat serum (13 mg/mL). Interestingly, our data showed that the binding affinity of our pAb to the Y bearing was high, while the binding affinity of that to the X-chromosome bearing sperm was similar to the negative control.<br> <br> <strong>Conclusions:</strong> In conclusion, our findings show that the goat anti-SRY pAb specifically binds to Ychromosome bearing sperm that suggesting its potential use for sex selection.</div> Polyclonal antibody, Sex determining region Y chromosome, Sperm sexing. 326 334 http://rbmb.net/browse.php?a_code=A-10-293-2&slc_lang=en&sid=1 Bijan Soleymani bijan.soleymani@kums.ac.ir 100319475328460017381 100319475328460017381 No Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran. Shahram Parvaneh shparvaneh79@gmail.co 100319475328460017382 100319475328460017382 No Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran. Ali Mostafaie amostafaie@kums.ac.ir 100319475328460017383 100319475328460017383 Yes Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.