"Oddly, considering it is Adobe’s own format, Premiere Cs6 does not yet work properly with DNG sequences – only supporting DNG at 8bit and giving a very poor image."
Premiere Pro doesn't support cinemaDNG because is not real-time playback: http://blogs.adobe.com/aftereffects/2012/09/cinemadng-in-after-effects-cs6-and-elsewhere.html