A cDNA clone of about 2500 base pairs was prepared from the human osteosarcoma cell line U-2 OS by hybridizing with a v-sis probe. Sequence analysis showed that this cDNA contains the coding region for the PDGF-B chain. It is discussed that the mitogen secreted by these osteosarcoma cells contains the PDGF-B chain and is probably a homodimer of two B-chains.
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Weich et al. (1986) studied this question.
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