First fluorescent frog found
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منابع مشابه
First crenarchaeal chitinase found in Sulfolobus tokodaii.
This is the first description of a functional chitinase gene within the crenarchaeotes. Here we report of the heterologues expression of the ORF BAB65950 from Sulfolobus tokodaii in E. coli. The resulting protein degraded chitin and was hence classified as chitinase (EC 3.2.4.14). The protein characterization revealed a specific activity of 75 mU/mg using colloidal chitin as substrate. The opti...
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The evolutionary origin of frog crabs (Raninoida) remains puzzling partly due to their astonishing morphological disparity, ranging from broad and heavily ornamented ‘crab-like’ extinct families (necrocarcinids and allies), to elongate and smoother ‘frog-like’ extant ones (raninids and allies). However, an ancient Cretaceous clade (Palaeocorystidae) displays a combination of plesiomorphic and a...
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Poison-dart Phyllobates terribilis frogs sequester lethal amounts of steroidal alkaloid batrachotoxin (BTX) in their skin as a defense mechanism against predators. BTX targets voltage-gated Na+ channels and enables them to open persistently. How BTX autoresistance arises in such frogs remains a mystery. The BTX receptor has been delineated along the Na+ channel inner cavity, which is formed joi...
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For success in science, as well as life, it is sometimes necessary to abandon the plan and embrace serendipity. In 1991, Charles O’Kelly tried, for several frustrating weeks, to separate a golden alga, collected from a New Zealand sheep pond, from a contaminating protozoan. “I was trying to grow the alga and the protozoan would not die. So I thought, this is trying to tell me something,” says O...
متن کاملDistribution of Ca*+ Channels on Frog Motor Nerve Terminals Revealed by Fluorescent o-Conotoxin
Tetramethylrhodamine-conjugated w-conotoxin was used as a fluorescent stain (Jones et al., 1989) to determine the spatial distribution of voltage-gated Ca2+ channels along frog motor nerve terminals. Like native w-conotoxin, the fluorescent toxin blocked neuromuscular transmission irreversibly. The fluorescent staining was confined to the neuromuscular junction and consisted of a series of narr...
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ژورنال
عنوان ژورنال: Nature
سال: 2017
ISSN: 0028-0836,1476-4687
DOI: 10.1038/nature.2017.21616