EXHIBIT 21 Enserch Exploration, Inc., its subsidiaries and their subsidiaries and affiliates, respectively, on March 1, 1997, are listed below. STATE OR COUNTRY OF NAME OF COMPANY INCORPORATION ENSERHC Corporation Enserch Exploration, Inc.(1) Texas EEX Capital L.L.C. Texas MIStS Issuer L.L.C.(2) Texas Enserch Offshore, Inc. Texas Enserch Oil & Gas, Inc. Texas Enserch Preferred Capital, Inc. Delaware DALEN Resources California Company Delaware Corpus Christi Energy Company Delaware Corpus Christi Hydrocarbons Company Delaware Enserch International Oil & Gas, Inc. Texas Enserch Far East Ltd. Cayman Islands Enserch India, Inc. Texas Enserch Malaysia Ltd. Cayman Islands Enserch Middle East Ltd. Cayman Islands Enserch (U.K.) Oil & Gas Limited United Kingdom Enserch International Exploration Ltd. Cayman Islands - ----------------------- (1) 17% owned by parent corporation. (2) .999% owned by EEX Capital L.L.C. and .001% owned by Enserch Preferred Capital, Inc.