Nucleic Acids Research, 1990, Vol. 18, No. 1 65-73
© 1990
MOLECULAR BIOLOGY |
Chloroplast genes transferred to the nuclear plant genome have adjusted to nuclear base composition and codon usage
Unidad de Genética, Facultad de Ciencias, Universidad de Granada E-18071-Granada, Spain 1Departamento de Genética y Biotecnia, Facultad de Biología, Universidad de Sevilla Aptdo. 1095, E-41080 Seville, Spain 2Departamento de Protección Vegetal CIT-INIA, Carretera Gral, de La Coruna Km 7, E-28040-Madrid, Spain
*To whom correspondence should be addressed
Received October 17, 1989. Accepted November 30, 1989.
During plant evolution, some plastid genes have been moved to the nuclear genome. These transferred genes are now correctly expressed in the nucleus, their products being transported into the chloroplast. We compared the base compositions, the distributions of some dinucleotides and codon usages of transferred, nuclear and chloroplast genes in two dicots and two monocots plant species. Our results indicate that transferred genes have adjusted to nuclear base composition and codon usage, being now more similar to the nuclear genes than to the chloroplast ones in every species analyzed.
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