PTPRG and small cell lung carcinoma: These authors detected the expression of extra 4.5-kb and 6.8-kb mRNAs in ACC-LC-171 human non–small-cell lung carcinoma cells and of 7.6-kb and 10.8-kb mRNAs in U-2 OS osteosarcoma cells, detected by using Northern blot analysis using a 2.8-kb EcoRI fragment of a partial PTPRG cDNA clone (Krueger and Saito, 1992).