ENGULFMENT MODEL. “The analysis of an ongoing domestication process—the conversion of a Synechococcus cyanobacterium into a “cyanelle” (protochloroplast) in the testate amoeba Paulinella chromatophora (Rhizaria)—is providing fascinating insights into what is entailed.”
http://cshperspectives.cshlp.org/content/6/3/a016154.full