Time filter

Source Type

Carlsbad, CA, United States

Michael T.P.,Ibis Biosciences
Briefings in Functional Genomics and Proteomics | Year: 2014

Plant genome size variation is a dynamic process of bloating and purging DNA. While it was thought plants were on a path to obesity through continual DNA bloating, recent research supports that most plants activity purge DNA. Plant genome size research has greatly benefited from the cataloguing of genome size estimates at the Kew Plant DNA C-values Database, and the recent availability of over 50 fully sequenced and published plant genomes. The emerging trend is that plant genomes bloat due to the copy-and-paste proliferation of a few long terminal repeat retrotransposons (LTRs) and aggressively purge these proliferating LTRs through several mechanisms including illegitimate and incomplete recombination, and double-strand break repair through non-homologous end joining. However, ultra-small genomes such as Utricularia gibba (Bladderwort), which is 82 megabases (Mb), purge excess DNA through genome fractionation and neofunctionalization during multiple rounds of whole genome duplication (WGD). In contrast, the largest published genome, Picea abies (Norway Spruce) at 19 800Mb, has no detectable WGD but has bloated with diverse and diverged LTRs that either have evaded purgingmechanisms or these purging mechanism are absent in gymnosperms. Finally, advances in DNA methylation studies suggest that smaller genomes have a more aggressive epigenomic surveillance system to purge young LTR retrotransposons, which is less active or missing in larger genomes like the bloated gymnosperms.While genome size may not reflect genome complexity, evidence is mounting that genome size may reflect evolutionary status. © The Author 2014. Published by Oxford University Press. All rights reserved. Source

Ibis Biosciences | Date: 2015-10-22

Provided herein are methods for improving the detection sensitivity of amplification reaction products. In particular, provided herein are methods of improving sensitivity of detection of amplification products by introducing modified and degradable nucleotides into amplification primers.

The methods described herein generally relate to characterization of large analytes, such as biomolecules, by molecular mass analysis. Specifically, the methods are directed to molecular mass analysis of singly- or multiply-charged ions by selective ion filtering carried out by a digital thresholding process.

The present invention realtes to systems and methods for amplifying nucleic acid. In particular, systems and methods are provided for inhibiting polymerase based terminal transferase activity within a polynucleotide amplification setting (e.g., polymerase chain reaction). In addition, systems and methods are provided for generating amplified products generated with polynucleotide amplification techniques having reduced 3 non-templated nucleotide addition.

Ibis Biosciences | Date: 2015-08-04

Provided herein is technology relating to testing biological samples and particularly, but not exclusively, to devices, systems, and kits for performing multiple, simultaneous real-time assays on a sample in a single-use disposable format. For example, the technology relates to an apparatus that finds use, for example, for point-of-care diagnostics, including use at accident sites, emergency rooms, in surgery, in intensive care units, as well as for non-medical applications.

Discover hidden collaborations