PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33340048-2 2021 Spermatozoa are exposed to immense changes in concentrations of CaSR ligands such as calcium, magnesium, and spermine during epididymal maturation, in the ejaculate, and in the female reproductive environment. Magnesium 94-103 calcium sensing receptor Homo sapiens 64-68 33340048-5 2021 RESULTS: CaSR is expressed in human spermatozoa and is essential for sensing extracellular Ca 2+ and Mg 2+. Magnesium 101-103 calcium sensing receptor Homo sapiens 9-13