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With Kolltan, Kinase Veteran Schlessinger Turns To Antibodies

This article was originally published in Start Up

Executive Summary

Joseph Schlessinger’s insights into receptor tyrosine kinases (RTKs) led to small-molecule treatments and huge success at Sugen and Plexxikon. Schlessinger’s latest venture, Kolltan Pharmaceuticals, had little trouble raising $75 million, but powering up a pipeline of antibodies to target novel RTKs has proven more challenging.

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