Linda Forrest's Mom had posted a press release regarding the Shh protein and its possible neuroprotective properties. (Shh has been established as being involved in differentiation and development of cell types in drosophila and rats) After a bit of searching , I found that the article in question is in the August 1st edition of the Journal of Neuroscience. (Vol 17, No. 15 pp 5891-5899) An abstract is available online at http://www.jneurosci.org/cgi/content/abstract/17/15/5891 Full text, however is not available without subscription. Sherline Lee Secretary APDA Young Parkinson's I&R Center