Annual 10-K filing for Ocata Therapeutic, Inc. lists Mytogen, Inc. as a subsidiary:
"10.6 Agreement and Plan of Merger dated July 31, 2007 by and among the Registrant, ACT Acquisition Sub, Inc., Mytogen, Inc. and certain shareholders of Mytogen, Inc.
Previously filed as exhibit 10.101 to the Amendment No. 1 to the Registrant’s 10-KSB for the year ended December 31, 2007 filed with the SEC on June 30, 2008 and incorporated by reference herein. "
http://ir.ocata.com/annual-reports#document-28894-0001019687-15-001409
http://ir.ocata.com/annual-reports?page=2#document-13634-0001047469-08-007884
Note: Advanced Cell Technology, Inc. changed it's name to Ocata Therapeutics, Inc. in 2014.