+ Visit NASA.gov + Contact NASA   + Home Select Search Field * All Report - Patent Number Abstract *Accession Number *NASA Center *Author NameDocument IDKeywordsPublication Date *Title * Find Results With All of the words At least one of the words Enter Search Term  within returned results    Search Tips: Use only the fields with * to search NIX collection. Enclose terms in double quotation marks (") to search for exact phrases, ie: "space shuttle". NOTE: Commas and dashes are removed from search term by search engine. Select Reset Search button to start a new search. See Help for more tips. + Publication Year Selected Navigations: Author > Farrell, E. R. [x] Sort results by: NASA Center | Date Added to NTRS | Publication Year There are a total of 2 record(s) matching your query. Sorted by: Date Added To NTRS in Descending order Laser ablation of persistent twist cells in Drosophila: muscle precursor fate is not segmentally restricted Author(s): Farrell, E. R.; Keshishian, H. Abstract: In Drosophila the precursors of the adult musculature arise during embryogenesis. These precursor cells have been termed Persistent Twist Cells (PTCs), as they continue to express the transcription factor Twist after that ... NASA Center: NASA (non Center Specific) Publication Year: 1999 Added to NTRS: 2006-08-02 Document ID: 20040142142 Muscle organizers in Drosophila: the role of persistent larval fibers in adult flight muscle development Author(s): Farrell, E. R.; Fernandes, J.; Keshishian, H. Abstract: In many organisms muscle formation depends on specialized cells that prefigure the pattern of the musculature and serve as templates for myoblast organization and fusion. These include muscle pioneers in insects and muscle ... NASA Center: NASA (non Center Specific) Publication Year: 1996 Added to NTRS: 2006-08-02 Document ID: 20040173201 + Back to Top + Sponsored by the NASA Scientific and Technical    Information Program + 2004 Vision for Space Exploration + Freedom of Information Act + NASA Web Privacy Policy and Important Notices + NASA Disclaimers, Copyright Notice,    and Terms and Conditions of Use NASA Official: Calvin Mackey Page Curator: NASA Center for AeroSpace Information (help@sti.nasa.gov) Last Updated: July 5, 2007