BioEssays

Cover image for Vol. 39 Issue 2

Edited By: Andrew Moore

Online ISSN: 1521-1878

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Volume 39, Issue 2, February 2017


Alternating terminal electron-acceptors at the basis of symbiogenesis: How oxygen ignited eukaryotic evolution

Alternating terminal electron-acceptors at the basis of symbiogenesis: How oxygen ignited eukaryotic evolution

Dave Speijer*

What symbiosis between archaeon and bacterium led to their eventual merger as eukaryotes? Fluctuating O2 levels alternatively favoured either ETC, leading to mutually beneficial exchange of intermediate carbohydrate metabolites. More O2 resulted in definitive loss of archaeal ETCs and their associated membrane potential, allowing bacterial uptake forming the proto-mitochondrion. Also see the video abstract here.

BioEssays2017, 39, No. 2, 0–0 [Insights & Perspectives]


MicroRNA annotation of plant genomes − Do it right or not at all

MicroRNA annotation of plant genomes − Do it right or not at all

Richard S. Taylor*, James E. Tarver, Alireza Foroozani, Philip C. J. Donoghue*

The potential exploitation of microRNAs in crop engineering is stymied by the poor annotation of plant microRNAomes, the quality of which is particularly poor in draft genome papers. We identify the common failings of microRNAome annotations and implore genome annotation teams to do it right, or not at all.

BioEssays2017, 39, No. 2, 0–0 [Insights & Perspectives]


Forces positioning the mitotic spindle: Theories, and now experiments

Forces positioning the mitotic spindle: Theories, and now experiments

Hai-Yin Wu, Ehssan Nazockdast, Michael J. Shelley, Daniel J. Needleman*

Although spindle positioning has been extensively studied, the underlying forces responsible for moving the spindle remain poorly understood. A recent pioneering study by Garzon-Coral et al. uses magnetic tweezers to perform the first direct measurements of the forces involved in positioning the mitotic spindle in Caenorhabditis elegans early embryos.

BioEssays2017, 39, No. 2, 0–0 [Prospects & Overviews]

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