found this:
https://authors.library.caltech.edu/74915/2/Feingold.SOM.DC1.pdf
It’s from this paper:
Feingold, E. A. and Pachter, L. (2004) The ENCODE (ENCyclopedia Of DNA Elements) Project. Science, 306 (5696). pp. 636-640. ISSN 0036-8075. doi:10.1126/science.1105136.
https://resolver.caltech.edu/CaltechAUTHORS:20170308-133717579