Open AccessDiversity of the ribosomal structures in theEuglena gracilischloroplast genome: description of a mutant with two ribosomal operons and possible mechanism for its production
Author(s) -
Patrick Ravel-Chapuis,
Frédéric Flamant,
P. Nicolas,
Philippe Heizmann,
Victor Nigon
Publication year - 1984
Publication title -
nucleic acids research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 9.008
H-Index - 537
eISSN - 1362-4954
pISSN - 0305-1048
DOI - 10.1093/nar/12.2.1039
Subject(s) - biology , euglena gracilis , ribosomal rna , genetics , mutant , genome , chloroplast , operon , ribosomal dna , evolutionary biology , gene , phylogenetics
We studied the bleached mutant of Euglena gracilis Y3BUD producing carotenoids and rich in chloroplast DNA. This mutant which was produced more than twenty years ago segregates permanently, forming 30 to 50% daughter cells without carotenoids and poor in chloroplast DNA. Electron microscopy and mapping with restriction enzymes show the deletion of a complete ribosomal operon out of the three present in the original strain.