doi: 10.1073/pnas.72.7.2635.
Isolation of a cationic polypeptide from human serum that stimulates proliferation of 3T3 cells
- PMID: 1058478
- PMCID: PMC432824
- DOI: 10.1073/pnas.72.7.2635
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Isolation of a cationic polypeptide from human serum that stimulates proliferation of 3T3 cells
Proc Natl Acad Sci U S A.
1975 Jul.
Abstract
A basic polypeptide that stimulates DNA synthesis and cell division in confluent populations of mouse Balb/c-3T3 cells has been isolated from whole human serum, and has been separated from the heterogenous group of molecules with insulin-like activity. This highly purified basic polypeptide has a molecular weight of 1.3 x 10(4) and an isoelectric point of 9.7. Approximately 10(7) polypeptide molecules in the growth medium allow the replication of one density-inhibited cell.
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