Tandem multiplication of a pre-existing domain is mutationally much simpler and more likely to be convergent than insertions at one site.
Alignments of the deduced amino acid sequences of these Floydiella genes with their homologs in the Chlorophyta and the Streptophyta revealed that their expansion is caused by sequence insertions at one or more sites within internal regions.
Thus we present three models: an unordered model (spacer content is considered as a set), an ordered model (where insertion is polarized, i.e., insertions occur at one end only) and a fragment loss model (where insertion is polarized and successive spacers can get deleted together in a single event).
The small buttress thread screw with a large taper displayed greater mean insertion torque at one-third insertion (4.1 ± 0.57 in-lb v 3.2 ± 0.49 in-lb, P =.03), whereas the large buttress thread screw with a small taper displayed greater mean insertion torque at full insertion (11.1 ± 0.74 in-lb v 9.4 ± 1.3 in-lb, P =.012).
In the current study we have introduced mutations and insertions at only one point.
Furthermore, from 58 segregating retrocopy insertions among 1,025 individuals, Ewing et al. calculated an approximate rate of retrocopy generation at one insertion per 5,177 individuals per generation.
Among them was a novel 800 bp transcript (GenBank accession no. EF051520 and EF050082) harboring an insertion of 18 bp at one place exclusively in the spleen, and several point nucleotide changes in sperm/kidney (Additional file 10).
Both the A1 and C5K strains, presented a mutation in pyrR, an uracil phosphoribosyltransferase. In mutIV-mix-2 two separate frameshift mutations were detected in pyrR, one insertion at position 2717183 (in 10.9% of reads) and a second one at position 271787 (in 70.4% of reads).
Hereinafter, for each parent, the best location of removed trains is determined by the insertion procedure one at a time.
Recently it is shown that targeted insertion could be achieved with CRISPR/Cas9 system via canonical non-homologous end joining (c-NHEJ) pathway without the need for homologous or microhomologous sequences (Schmid-Burgk et al., 2016; Suzuki et al., 2016), so it is plausible to achieve targeted insertion at different sites with one universal donor vector using CRISPR/Cas9 system.
