Proc Natl Acad Sci U S A. 2016 Oct 25;113(43):12214-12219 doi:10.1073/pnas.1608016113

Nowack EC, Price DC, Bhattacharya D, Singer A, Melkonian M, Grossman AR.

Gene transfers from diverse bacteria compensate for reductive genome evolution in the chromatophore of Paulinella chromatophora.

Found splice leaders in P. chromatophora. Horizontal gene transfer as a possible mechanism facilitating gene loss in endosymbionts.