gilleain

52 ms·

661.
by gilleain 7y ago
On the laptop is a screenshot from fold.it ... of a sheet wrapped round a helix. Not sure what structure it is.
662.
by gilleain 7y ago
Fair, but I would not really call a single helix a 'fold', either! Ok, so I'm playing with definitions here a bit. Clearly 2k9b adopts a helical structure so it is 'folded' in some sense. However it has no tertiary
663.
by gilleain 7y ago
Thats a bit confusing, as proteins _are_ polypeptides. All proteins are (poly)peptides, but not all peptides are proteins.
664.
by gilleain 7y ago
The boundary between 'peptide' and 'protein' is a little fuzzy. There are 'small proteins' like: https://en.m.wikipedia.org/wiki/Thionin that are 45-48 amino acids which is less than the (
665.
by gilleain 7y ago
A couple of the large files are explainable: - The largest .c file is actually the CATH database, not sure why it has that extension - The large .cpp file is actually C++ but has a kind of 'data as code' approach defining bonds be
666.
by gilleain 7y ago
Your tissues can turn blue from excess silver: https://en.m.wikipedia.org/wiki/Argyria But that probably doesn't affect the blood.
667.
by gilleain 7y ago
Although natural, that reactor is geological not biological. It's unlikely that enzymes could catalyse fission reactions. It would be amazing if they could...
668.
by gilleain 7y ago
The author is https://en.m.wikipedia.org/wiki/John_C._Baez who: > He is known for his work on spin foams in loop quantum gravity.[3][4] For some time, his research had focused on applications of higher categories to
669.
by gilleain 7y ago
Sigh, thanks. Should have read it all.
670.
by gilleain 7y ago
A similar idea is explored in the novel 'The Tin Men' by Michael Frayn ( https://en.wikipedia.org/wiki/The_Tin_Men ). One of the characters invents 'Unit Headline Language' (UHL) with constructs like
671.
by gilleain 8y ago
7 billion , not trillion
672.
by gilleain 8y ago
A layer of lipid, really, although there are certainly proteins in the membrane. I've no idea about pressure adaptation, but a quick google gives this (open) paper that looks useful: https://www.ncbi.nlm.nih.gov/pmc&#x2
673.
by gilleain 8y ago
The title of the paper is "Helical orbitals and circular currents in linear carbon wires"... ... but they do refer to them as "promising candidates for novel applications" which indicates actual applications are a little
674.
by gilleain 8y ago
Some people have burned it: https://en.wikipedia.org/wiki/K_Foundation#The_K_Foundation_...
675.
by gilleain 8y ago
Heh, I was curious so: Hindi/Urdu http://en.wikipedia.org/wiki/List_of_English_words_of_Hindi_... : eg Avatar, Bungalow, Cot, Dungaree, Jungle ... Chinese/Japanese : https://en.wikipedia.org/w
676.
by gilleain 8y ago
I think they are "symmetric icons" : http://www.alunw.freeuk.com/symiconroom.html Can't remember where I've seen them before - possibly in a book on Symmetry.
677.
by gilleain 8y ago
there are also knotted proteins, although they are rarer: https://en.m.wikipedia.org/wiki/Knotted_protein
678.
by gilleain 8y ago
Apparently: https://en.wikipedia.org/wiki/Lockheed_Martin_Compact_Fusion... > In May 2016, Rob Weiss announced that Lockheed Martin continued to support the project and would increase its investment in it
679.
by gilleain 8y ago
From the paper at https://royalsocietypublishing.org/doi/10.1098/rsos.181447 it is 90 m/s vs mantis shrimp's 30 m/s. > The duration of the snap movement is one thousand times shorter than the sna
680.
by gilleain 8y ago
So the estimate is: >200 to 600 octillion microbes (2 to 6x10^29 cells) live in the continental subsurface. Ok, can you give me that in blue whales? >These cells represent about four to 13 petagrams of carbon, (each petagram is about
681.
by gilleain 8y ago
Lol : "Bodily molecules". Previous discussion https://news.ycombinator.com/item?id=18530367
682.
by gilleain 8y ago
You are quite right that the properties of most proteins are very different to that of even copolymers. In fact, simple structural proteins (like keratin, collagen, etc) are much more like synthetic homopolymers than the complex nanomachine
683.
by gilleain 8y ago
Not so. There are of course, 'uniform' polymers made from a single repeating subunit. However, natural non-uniform ones like proteins are also polymers, as are synthetic ones with two repeating units (EVA, for example). From wikip
684.
by gilleain 8y ago
Feature request/idea: Would be nice to be able to 'pipe' the results of one search into another. Imagine a series of search boxes, with the results of the first fed into the second, and so on. Like: > codegrep --class &quo
685.
by gilleain 8y ago
His prize was : > for his development of crystallographic electron microscopy and his structural elucidation of biologically important nucleic acid-protein complexes. Including virus structure, such as tobacco mosaic virus: http:/&
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by gilleain 8y ago
One of the first people to consider this was Thomas Gold ( https://en.wikipedia.org/wiki/Thomas_Gold ), for example http://www.pnas.org/content/89/13/6045 . There's a nice review here
687.
by gilleain 8y ago
What? Denmark is a small town of 5,700 people, isn't it? edit: Then I got curious about what size a 'town' is, which led me to https://en.wikipedia.org/wiki/Settlement_hierarchy which gave me the word &#
688.
by gilleain 8y ago
There is also Jmol, a molecular editor, that allows you to save scripts as .pngj files: http://wiki.jmol.org/index.php/File_formats/Compressed
689.
by gilleain 8y ago
Huh, so its related to the problem of finding the restricted weak compositions of a number. A composition is an ordered partition. A partition is the set of numbers that sum to a particular number. The 'weak' part allows zeros.
690.
by gilleain 8y ago
Indeed, the premise is just wrong. It's not as if organisms cannot process biomolecules of the other handedness. There are enzymes called 'epimerases' and 'racemases' ( https://en.wikipedia.org/wiki&#

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