ISSN:
1573-5028
Keywords:
replication origin
;
ARS
;
rDNA
;
Pisum sativum
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The replication origin (ori-r9) of the 9.0 kb rDNA repeats of pea (Pisum sativum, cv. Alaska) was cloned and found to reside in a 1.5 kb fragment of the non-transcribed spacer region located between the 25 S and 18 S genes. Labeled rDNA rich in replication forks, from cells positioned at the G1/S phase boundary, was used to map ori-r9 by hybridization procedures. Ori-r9 is in a 210-base fragment that is 1.6 kb from the 5′ end of the 18 S gene and about 1.5 kb from the 3′ end of the 25 S gene. The same procedures, using labeled synthetic ARS consensus sequence as a probe, showed than an ARS consensus sequence is located 3′ to ori-r9 in a 710-base fragment. An ARS consensus sequence is, therefore, adjacent to ori-r9 but not coincidental with it.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00014947
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