[Various biological properties of diploid cell strains derived from various tissues of human embryo]

Some properties of 4 diplod cell strains derived from the lung and skin-muscle tissue of human embryos were studied. Only one strain (L-63) was shown to have a stable karyotype throughout its life span and induced no tumor formation in the cheek pouch of hamsters. Species-specific and group antigens were revealed. In the cell strains of the lung and skin-muscle derivation differences in the distribution of lactate dehydrogenase isoenzymes were observed and found characteristic of the original tissue cells.