scholarly journals Molecular phylogeny of Dipterocarp Species Using Nucleotide Sequences of Two Non-coding Regions in Chloroplast DNA.

Tropics ◽  
1998 ◽  
Vol 7 (3/4) ◽  
pp. 195-207 ◽  
Author(s):  
Koichi KAMIYA ◽  
Ko HARADA ◽  
Kazuhiko OGINO ◽  
Tadashi KAJITA ◽  
Tsuneyuki YAMAZAKI ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Chloroplast Dna ◽  
Nucleotide Sequences ◽  
Coding Regions

scholarly journals Molecular phylogeny of Sri Lankan Dipterocarpaceae in relation to other Asian Dipterocarpaceae based on chloroplast DNA sequences

Tropics ◽  
2003 ◽  
Vol 13 (2) ◽  
pp. 79-87 ◽  
Author(s):  
Dayananda Thawalama GAMAGE ◽  
Morley de SILVA ◽  
Akira YOSHIDA ◽  
Alfred E. SZMIDT ◽  
Tsuneyuki YAMAZAKI
Keyword(s):  
Molecular Phylogeny ◽  
Chloroplast Dna ◽  
Dna Sequences ◽  
Sri Lankan ◽  
Chloroplast Dna Sequences

scholarly journals Absence of abnormalities of c-kit or its ligand in two patients with Diamond-Blackfan anemia

Blood ◽  
1992 ◽  
Vol 79 (1) ◽  
pp. 25-28 ◽  
Author(s):  
JL Abkowitz ◽  
VC Broudy ◽  
LG Bennett ◽  
KM Zsebo ◽  
FH Martin
Keyword(s):  
Stem Cell ◽  
Clinical Features ◽  
Stem Cell Factor ◽  
Nucleotide Sequences ◽  
Diamond Blackfan Anemia ◽  
Coding Regions ◽  
Kit Receptor ◽  
Structural Abnormalities ◽  
Human Disorder ◽  
Normal Controls

As Diamond-Blackfan anemia shares clinical features with W and Steel defects in mice, we investigated the possibility that this human disorder might result from an abnormality of the c-kit receptor or its ligand, stem cell factor (SCF). For these studies, full nucleotide sequences for coding regions of c-kit and SCF were generated for two Diamond-Blackfan anemia patients and were normal. Similarly, the kds of SCF receptors on their marrow cells (31 pmol/L, 43 pmol/L) were comparable with those found in three normal controls (50 pmol/L, 55 pmol/L, 27 pmol/L). Serum SCF concentrations were 6.9 ng/mL in patient A, 14.6 ng/mL in patient B, who has been in hematologic remission since adolescence, and 2.7 ng/mL in the 3-year-old daughter of patient B, who also has Diamond-Blackfan anemia but is transfusion-dependent. It is possible that the SCF level in patient B increased with puberty, leading to her remission. These data provide evidence that Diamond- Blackfan anemia does not result from structural abnormalities of c-kit or SCF.

scholarly journals Molecular Systematics, Taxonomy and Distribution of the Pyrrhura Picta–Leucotis Complex

2017 ◽  
Vol 10 (1) ◽  
pp. 53-91 ◽  
Author(s):  
Thomas Arndt ◽  
Michael Wink
Keyword(s):  
Phylogenetic Analysis ◽  
Molecular Phylogeny ◽  
Molecular Systematics ◽  
Species Complex ◽  
Morphological Analysis ◽  
Nucleotide Sequences ◽  
Mitochondrial Cytochrome ◽  
Species Status ◽  
New Subspecies ◽  
Paraphyletic Group

Introduction: The relationships within the Pyrrhura species complex are partly unresolved. In this study, a comprehensive phylogenetic analysis of the Pyrrhura picta-leucotis complex was carried out, covering all species except P. subandina. Material and Methods: We made a morphological analysis of 745 preserved specimens of all the taxa in different museums. Nucleotide sequences of the mitochondrial cytochrome gene were generated and used to reconstruct a molecular phylogeny of Pyrrhura. Results and Discussion: Our results show that the complex is divided into 6 main groups comprising 15 species. P. dilutissima, regarded up to now as a subspecies of P. peruviana, acquires species status and three new subspecies are described. We also provide evidence that P. roseifrons is a paraphyletic group, indicating the existence of probably 3 lineages of which 2 deserve species status.

scholarly journals An Exploration of the Triplet Periodicity in Nucleotide Sequences with a Mature Self-Adaptive Spectral Rotation Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Bo Chen ◽  
Ping Ji
Keyword(s):  
Random Walk ◽  
Complex Plane ◽  
Query Sequence ◽  
Nucleotide Sequences ◽  
Sequence Pattern ◽  
Coding Regions ◽  
Persistent Pattern ◽  
Triplet Periodicity ◽  
Self Adaptive

Previously, for predicting coding regions in nucleotide sequences, a self-adaptive spectral rotation (SASR) method has been developed, based on a universal statistical feature of the coding regions, named triplet periodicity (TP). It outputs a random walk, that is, TP walk, in the complex plane for the query sequence. Each step in the walk is corresponding to a position in the sequence and generated from a long-term statistic of the TP in the sequence. The coding regions (TP intensive) are then visually discriminated from the noncoding ones (without TP), in the TP walk. In this paper, the behaviors of the walks for random nucleotide sequences are further investigated qualitatively. A slightly leftward trend (a negative noise) in such walks is observed, which is not reported in the previous SASR literatures. An improved SASR, named the mature SASR, is proposed, in order to eliminate the noise and correct the TP walks. Furthermore, a potential sequence pattern opposite to the TP persistent pattern, that is, the TP antipersistent pattern, is explored. The applications of the algorithms on simulated datasets show their capabilities in detecting such a potential sequence pattern.

A molecular phylogeny of bryophytes based on nucleotide sequences of the mitochondrialnad5 gene

1999 ◽  
Vol 218 (3-4) ◽  
pp. 179-192 ◽  
Author(s):  
Susanne Beckert ◽  
Siegfried Steinhauser ◽  
Hermann Muhle ◽  
Volker Knoop
Keyword(s):  
Molecular Phylogeny ◽  
Nucleotide Sequences
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