Western blot analysis, performed on whole cell lysates from life-extended fibroblasts or HF-HD1GFP cells by using an antibody to HDAC1, demonstrated expression of a 55 kDa endogenous HDAC1 in both cell populations and an additional 75 kDa HDAC1-GFP exclusive to the transduced cells (Fig. 1A, right panel). The gene discussed is HDAC1; the disease is hydrops fetalis.