Isolation of membrane-associated folded chromosomes from Anacystis nidulans

Particles containing folded DNA were isolated from the blue-green alga Anacystis nidulans. The structure of these particles is vesicle-like and similar to that of membrane-associated nuclear bodies which had been isolated from Escherichia coli under comparable conditions. The sedimentation constant is between 8000 and 9000 Svedbergs. The DNA is inside the particles and is attached to the thylakoid membranes.