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plana neuronal somata, histology, and ultrastructure revealed neurons with one euchromatic round-to-oval nucleus with one salient nucleolus, and cytoplasm with the usual key organelles, standing out mitochondria; overall in line with the other bivalve species (Bullock & Horridge 1965, Odiete 1978, Stefano 1990, Morse & Zardus 1997).
7 % sequence divergence between homologous euchromatic regions) with nine large and several smaller inversions (The Tomato Genome Consortium, 2012), providing evolutionary data relating to these two sister clades.
However, variations in the euchromatic regions cannot be disregarded.
Control rats showed normal epithelial cells with regularly arranged columnar cells and large rounded euchromatic nuclei.
In these sections for each of these nuclei, the neurons, identified by the euchromatic nucleus having one or two nucleoli and Nissl substance in the cell body, were drawn on a translucent paper with the help of a camera lucida drawing tube using a 100x objective.
This species has been preferred as a model organism for legume biology because it has a small diploid (2n = 16) genome (500-550 Mbp total and200-250 Mbp to be sequenced in gene-rich euchromatic regions), is self-fertile, has a rapid generation time and prolific seed production, and is amenable to genetictransformation (Erayman et al.
G9a histone methyltransferase plays a dominant role in euchromatic histone H3 lysine 9 methylation and is essential for early embryogenesis.
It typically appears as a papule or solitary nodule, euchromatic or red in the sole or lateral border of the feet, corresponding to 2/3 of the cases; as with other eccrine gland tumors, a pigmented variant of rare presentation exists (2,3) other sites affected are: the distal extremities, palms, and fingers, and less likely in the forearms, eyelids, thorax, scalp, external auditory canal, hip, gluteus, and abdomen (4-9).
Euchromatic regions are modified to allow an open conformation, rendering the regions accessible to cellular proteins favoring transcription.
The best analogy in pathology is the difference in staining quality and chromatin pattern in a benign cell, which is euchromatic and uniform, compared with a malignant cell, which is often hyperchromatic and irregular.
Recent studies suggest that classical euchromatic variants of 9q12/qh+ and heteromorphism on chromosome 6q may be responsible for recurrent abortions (15, 16).
3) International Human Genome Sequencing Consortium, "Initial Sequencing and Analysis of the Human Genome," Nature 409 (2001): 860-920; International Human Genome Sequencing Consortium, "Finishing the Euchromatic Sequence of the Human Genome," Nature 431 (2004): 931-45.
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