PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1608406-10 1992 We also found a positive correlation between serum beta 2-microglobulin (which is inversely related to the glomerular filtration rate) and blood lead in men, between serum beta 2-microglobulin and zinc protoporphyrin in both sexes, and between serum creatinine and zinc protoporphyrin in men. zinc protoporphyrin 265-284 beta-2-microglobulin Homo sapiens 51-71