****************************************************** PR # 12216 We propose to study the high luminosity AGN MKN 205, elucidating complex features in the X-ray spectrum, detected but not constrained by GINGA.The combination of broad bandpass, energy resolution, low background and sensitivity of ASCA will enable superlative measure- ments of the continuum form. MKN 205 was one of only three high luminosity AGN which showed strong evidence for Fe K line emission; ASCA will be able to measure the energy and width for the first time. The study will thus place strong constraints on the physical conditions in the active nucleus. ******************************************************