May play a role in the suppression of metastatic potential in lung adenoma carcinoma cells. Expressed in kidney, stomach, spleen, bone marrow, uterus, testis, placenta, skeletal muscle, mammary gland, lung, fetal liver, and fetal kidney, but not detected in small intestine, brain, and thymus. Expressed in low-metastatic lung adenocarcinoma cells but not in high-metastatic ones. Belongs to the actin family.