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Helical ct

Helical ct --> spiral computed tomography

(Science: radiology) computed tomography in which the x-ray tube continuously revolves around the patient, who is simultaneously moved longitudinally; computer interpolation allows reconstruction of standard transverse scans or images in any preferred plane.

Synonym: helical computed tomography, helical ct, spiral ct.

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Re: Bacterial Taxonomy

... of fimbriae. Hami are similar to fimbriae—both are long projections from the cell that serve a common function—but hami are "barbed" helical projections with hooked tips. I don't know how an archaean would Gram stain.

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by wildfunguy
Tue Dec 03, 2013 12:21 am
Forum: Microbiology
Topic: Bacterial Taxonomy
Replies: 3
Views: 4341


... prokaryotes. It consists of a compact assembly or aggregate of flagellated bacterial cells, highly organized in a sphere, that swim in either helical or straight trajectories. The life cycle of ‘Candidatus Magnetoglobus multicellularis' is completely multicellular, in which one aggregate grows ...

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by BlahBlahBlah
Thu Jun 27, 2013 1:46 pm
Forum: Microbiology
Topic: Multicellular prokaryote
Replies: 27
Views: 28145

how predict which aminoacid form secondary structure

... biopolymers such as proteins and nucleic acids. Secondary structure was predicted by using the programs PSIPRED and ALB. The residues predicted as helical are marked by H by PSIPRED and by H and & by ALB, and those predicted as -structural are marked by E by PSIPRED and by S and B by ALB.

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by Fred111
Wed Dec 26, 2012 12:10 pm
Forum: General Discussion
Topic: how predict which aminoacid form secondary structure
Replies: 2
Views: 1656

coat structure in white bean seeds

Hi, while observing detached white bean testa in optical microscopy, I saw some long helical structures - seemingly included in thiny walled pipes (not sure of this) and roughly 20 µ large - laying onto the coat plane and assembled in branched bundles (jpeg attached). ...

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by leosilv
Tue Sep 04, 2012 4:38 pm
Forum: Botany Discussion
Topic: coat structure in white bean seeds
Replies: 2
Views: 2987

Re: Cell membrane targeting signals.

... embedded in the membrane by hydrophobic regions that span the phospholipid bilayer. The membrane-spanning portions of these proteins are usually α-helical regions consisting of 20 to 25 hydrophobic amino acids. The formation of an α helix maximizes hydrogen bonding between the peptide bonds, and ...

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by Fransis
Tue Sep 06, 2011 9:39 am
Forum: Cell Biology
Topic: Cell membrane targeting signals.
Replies: 3
Views: 6492
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