All Republicans joined with 10 Democrats to defeat the domestic partnership bill.
Sen Carlos Cisneros, who originally voted "yes" changed his vote to "no." That might be a tactic to allow him to make a motion to reconsider in the future if some of the other votes are changed. (only someone who voted with the majority to defeat a bill can move to reconsider.)
Besides Cisneros, the Democerats who voted against the bill were Pete Campos, Linda Lovejoy, Richard Martinez Tim Jennings, George Munoz, John Pinto, Bernadette Sanchez, John Arthur Smith and David Ulibarri.
Update: I changed this to correct a math error.