Life Lines by Dr. Dolittle

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Tag Archive for ‘DNA’

Sleep = better DNA repair

I read an interesting article published in Nature Communications that described how zebrafish larvae need sleep to help fix damaged DNA that accumulates in their brains during the day. The researchers engineered zebrafish larvae to have fluorescent chromosomes in a single neuron, which allowed them to observe double-strand breaks in the DNA build-up during wakefulness. In contrast, chromosome activity necessary for repair increased when the animals were sleeping. If the researchers disrupted […]

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Longevity of dogs

Dogs are weird when it comes to predicting longevity based on body size. For many species, small body size means higher metabolic rate and shorter lifespan. For dogs, smaller body size = longer lifespan. Dr. Ana Jimenez (Colgate University) presented research at the Comparative Physiology meeting this weekend showing that larger dogs do indeed develop more DNA damage with aging than smaller dogs.

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Using feces to identify species

According to a press release from Northern Arizona University, Drs. Faith Walker and Carol Chambers at the Bat Ecology & Genetics Lab have developed a system called Species From Feces to identify bat species from guano collected in field locations such as mines, caves, bridges, etc. The system takes advantage of DNA sequencing technology and an assay to look for genetic identifiers unique to different species using DNA barcodes. The sequences can then […]

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Genetic regulation of horse conformation

In a new study published in Physiological Genomics, researchers explored the role of genetics in the conformation of Tennessee Walking Horses. In other words, how close each animal they sampled looked to an “ideal” Tennessee Walking Horse.  According to Kylee Jo Duberstein (Department of Animal and Dairy Science, University of Georgia), there are five criteria that are examined when evaluating the conformation of a horse. These include “balance, structural correctness, way of going, […]

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