JPMorgan Chase has been sued for $95 million by US Bank NA, trustee for securities marketed in 2005 by the former Bear Stearns Cos over alleged misrepresentations regarding the underlying mortgage loans. US Bank NA wants to force JPMorgan to buy back the mortgage loans because of alleged breaches of representations and warranties regarding the Bear Stearns Asset Backed Securities Trust 2005-4, for which it serves as trustee.  It also said JPMorgan has refused to provide the underlying loan, as the trust documents require, so it can investigate the extent of the alleged breaches. The unit of US Bancorp said it made its request at the direction of a majority certificate holder in the trust. US Bank also sued Bear Stearns and its former EMC Mortgage Corp unit. JPMorgan bought Bear Stearns in 2008. It is one of many lawsuits seeking to hold banks responsible for investor losses over mortgages that may have been toxic, defective or improperly underwritten. A JPMorgan spokeswoman did not immediately respond to requests for comment. The case is Bear Stearns Asset Backed Securities Trust 2005-4 v. EMC Mortgage Corp et al, New York State Supreme Court, New York County, No. 650003/2012. [Reuters - 1/3/11]