HYDROLASE, SUBUNIT E, METHANOCALDOCOCCUS JANNASCHII, A1AO ATP SYNTHASE, ATP SYNTHESIS, HYDROGEN ION TRANSPORT, ION TRANSPORT, TRANSPORT 2KK7 NMR SOLUTION STRUCTURE OF THE N TERMINAL DOMAIN OF SUBUNIT E (E1-52) OF A1AO ATP SYNTHASE FROM METHANOCALDOCOCCUS JANNASCHII