J.P. Morgan warns: Antitrust case may cost Apple (AAPL.US) a third of its Google revenue

Google's (GOOG.US, GOOGL.US) deals with smartphone manufacturers such as Apple (AAPL.US) are at the heart of the US Department of Justice's antitrust lawsuit against the search giant. Investment firm Jefferies said that if the US Department of Justice ultimately prevails after a series of appeals, Apple could lose a significant amount of revenue.