Inverted repeats (IRs) are commonly found flanking the transposase ORF s) of IS elements, but are notably absent in the IS200/IS605 [ 12- 14] and IS110 families [ 15].
Short target-site duplications are commonly found flanking LTR retrotransposons (Gao et al. 2012).
The start site is most commonly flanked by a pyrimidine base; in particular, C and T are the residues most commonly used at positions −1 and +2, respectively.
SK-N-FI cells are commonly grown as flank model xenografts, but we believe that the implantation used in this study more accurately reflects the true biology of neuroblastoma by placing the tumor near the adrenal glands of the mouse sympathetic nervous system.
In the ciliate Paramecium, IESs are commonly short, AT-rich, and flanked by 5′-TA-3′ dinucleotide repeats that are in turn part of larger 8-bp imperfect terminal inverted repeats (Betermier 2004).
CpG motifs are commonly methylated in eukaryotic DNA, and inhibitory sequences flanking CpG dinucleotides in mammalian DNA can also mask its stimulatory effects (36).
For example, lahars may initiate at some distance from the summit, lavas are commonly effused from fissure zones on volcano flanks, and gases and hydrothermal systems may be widespread beyond the summit.
The short read lengths of SGS are commonly unable to span repetitive regions with at least one unique flanking sequence.
These diagnostic tools are commonly designed around the fast evolving ITS2, which have consistently revealed informative species-level sequence variation and are flanked by conserved gene regions, greatly simplifying PCR primer design and analysis.
Such sequences are commonly observed remnants of LTR retrotransposons, and likely arise from recombination between the direct repeat sequences that flank retroelements [ 26].
The reasons for the large rejection of candidate sequences are commonly observed and include either unsuitable base composition (for example, too high/low GC content), or more often, because insufficient flanking region was available to attach the primers.
