In the experimental study conducted by Casscells et al. to observe the immunohistochemical aspects of fibronectin in acute myocardial infarction, it was found that fibronectin was irregularly located in the cytoplasm and in the interstitial space of myocytes of the area irrigated by the ligated coronary infarction [14]. The gene discussed is FN1; the disease is acute myocardial infarction.