31. There also exist PTOX cyanophages that contain copies of the gene for the plastid oxidase. 32. Late into the constriction phase, dynamin proteins assemble around the outer plastid -dividing ring, 33. Plastids have DNA sequences that indicate origin from the cyanobacteria ( blue-green algae ).34. In contrast, they have no effect on the plastids of the highly developed vascular plants. 35. This is supporting the endosymbiotic theory and indicates an evolution of plastid division in land plants. 36. As a result, many plastid and mitochondrial processes are driven by nuclear encoded gene products. 37. The process of secondary endosymbiosis left its evolutionary signature within the unique topography of plastid membranes. 38. All dinoflagellates contain red algal plastids or remnant ( nonphotosynthetic ) organelles of red algal origin. 39. In some cases these plastids may be reduced in their metabolic and / or photosynthetic capacity. 40. Amyloplasts are plastids , specifically leucoplasts.
