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Epidermal growth factor or serum stimulation of rat fibroblasts induces an elevation in mRNA levels for lactate dehydrogenase and other glycolytic enzymes.

We have isolated cloned cDNAs corresponding to five mRNAs whose level is increased following stimulation of quiescent rat fibroblasts by either epidermal growth factor or serum. Partial sequencing followed by a computer search of data banks has shown that the cloned cDNAs correspond to mRNAs encoding proteins with extensive homology to lactate dehydrogenase, glyceraldehyde 3-phosphate dehydrogenase, enolase, triose phosphate isomerase, and actin. The complete nucleotide sequence of a rat fibroblast lactate dehydrogenase is presented.