These experiments appear to indicate that whatever substance in embryonic tissue extracts excites mitosis, and therefore would appear to be the growth-stimulating substance, is capable of passing through a collodion membrane which is impermeable to proteins, at all events in such concentration as would give rise to any biuret reaction. The substance is therefore diffusible.
This content is only available as a PDF.
Copyright, 1926, by The Rockefeller Institute for Medical Research New York
1926
You do not currently have access to this content.
