RT Journal Article SR Electronic T1 Localisation of factor XIII in human tissues using an immunoperoxidase technique. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 560 OP 563 DO 10.1136/jcp.37.5.560 VO 37 IS 5 A1 J D Fear A1 P Jackson A1 C Gray A1 K J Miloszewski A1 M S Losowsky YR 1984 UL http://jcp.bmj.com/content/37/5/560.abstract AB An immunoperoxidase technique has been used to localise clotting factor XIII subunits A and S in human tissues. The presence of factor XIII in placenta and megakaryocytes was confirmed. Factor XIII was also found in fibroblasts, a hitherto unreported finding. Factor XIII subunits were not detected in hepatocytes, although factor XIII was found in fibroblasts in portal tracts. These findings suggest that factor XIII is not synthesised in the liver as previously thought.