This hypothesis plus that the shifted intron positions were located in the extracellular variable domain let us to check if intron exon sequences could be implicated as a source of sequence variability by producing expansion or contraction of exons length.
The resultant sequences were split into one of the two lengths, 201 bp and 401 bp, to generate two large datasets of DNase accessible sequences to be used as a source of background sequences in later analyses.
This report successfully provides evidence about the function of snake venom gland and a source of reptilian sequences.
This yielded two datasets of mappable regions, to be used as a source of background sequences in later analyses.
Based on the hypothesis of Britten and Davidson (1971), repetitive elements can be a source of regulatory sequences and act to distribute regulatory elements throughout the genome.
As a source of transcript sequences we used plant gene indices of The Institute of Genome Research (TIGR), which are up-to-date non-redundant (unigenes) EST collections [ 71].
As a source of transcript sequences we used plant gene indices of The Institute of Genome Research TIGRR), which are non-redundant (unigenes) EST collections [ 51].
If the telomere of one sister chromatid becomes critically short due, for example, to a rapid deletion event, the other sister chromatid could be used as a source of telomeric sequences for elongation.
In general, the genomes of higher eukaryotes contain thousands, even millions, of seemingly inactive transposable elements, which have been suggested as a source of interspecific sequence divergence.
Libraries are used for physical genome map construction, gene cloning and as a source of direct sequencing templates, which include short genomic fragments up to several thousand bp and P1 phage artificial chromosomes (PACs), bacterial artificial chromosomes (BACs) and yeast artificial chromosomes (YACs) containing large inserts (10 300 kb).
