sentences:  The best studied kDNA structure is that of "Crithidia fasciculata", a catenated disk of circular kDNA maxicircles and minicircles, most of which are not supercoiled.Exterior to the kDNA disk but directly adjacent are two complexes of proteins situated 180˚ from each other and are involved in minicircle replication.Variations of kinetoplast networks have also been observed and are described by the arrangement and location of their kDNA.