Human platelets contain discrete glycoproteins that promote the growth of 3T3 (platelet-derived growth factor 1) and SV3T3 (platelet-derived growth factor 2) cells. The factor that promotes the growth of SV3T3 cells is a heat-labile nondialyzable glycoprotein with an isoelectric point of 7.8 to 8.3.

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This work was supported by Grant PCM 7922936 from the National Science Foundation.

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©1981 American Association for Cancer Research.
1981
Cancer Research, Inc.