Are Eukaryotes reversible?

This Massey (NZ) Uni article hints at a scientific publication which implies that Eukaryotes ("multi-nucleated beings") did not develop from Prokaryotes ("single-nucleus beings") as has often been supposed in the past.

“The article was carefully edited to review a massive amount of genomic and biological information about the evolutionary trajectory of modern eukaryotes, as distinct from that of prokaryotes — organisms whose DNA is not contained within a nucleus.”

So... another major new story-thread in biology! The only constant thread is that of change?

Comments

Leon RJ Brooks said…

If that doesn't sound sweeping enough, wave your thinkatron over these words for a while:

[START] From their origin, eukaryotes were complex. They had introns (& complex spliceosomes — half of whose 78 proteins are unique to eukaryotes — to handle them), mitosomes, hydrogenosomes, mitochondria, nuclei, nucleoli, the Golgi apparatus, centrioles, & an endoplasmic reticulum, along with "hundreds of proteins with no orthologs evident in the genomes of prokaryotes."

Much text there describes unprecedented features of eukaryotes, which "cannot be deconstructed into features inherited directly from archaea & bacteria." [FINISH]

11 June, 2006 08:37

Leon RJ Brooks said…

Quote, BTW is ex-Wikipedia. Thanks, WP. (-:

11 June, 2006 11:08

new life for an old (FTX) PSU, improved life for one human

the LEDs on this 5m strip happen to emit light centred on a red that does unexpectedly helpful things to (and surprisingly deeply within) a human routinely exposed to it. it has been soldered to a Molex connector, plugged into a TFX power supply from a (retired: the MoBo is cactus) Small Form Factor PC, the assorted PSU connectors (and loose end from the strip) have been taped over. the LED strip cost $10.24 including postage, the rest cost $0, the PSU is running at 12½% of capacity, consumes less power than a laptop plug-pack despite running a fan. trial runs begin today.

boundaries

pushing the actual boundaries of the physical (not extremes, the boundaries themselves) can often remove barriers not otherwise perceived. one can then often resolve an issue itself, rather than merely stonewalling at the physical consequences of the issue.

every-application-is-part-of-a-toolkit at work

I have a LibreOffice Impress slideshow that I wish to turn into a narrated video. 1. export the slideshow as PNG images (if that is partially broken — as at now — at higher resolutions, Export Directly as PDF then use ‘pdftoppm’ (from the poppler-utils package) to do the same). 2. write a small C program (63 lines including comments) to display those images one at a time, writing a config file entry for Imagination (default transition: ‘cross fade’) based on when the image-viewer application (‘display,’ from the GraphicsMagick suite) is closed on each one; run that, read each image aloud, then close each image in turn. 3. run ‘Imagination’ over the config file to produce a silent MP4 video with the correct timings. 4. run ‘Audacity’ to record speech while using ‘SMPlayer’ to display the silent video, then export that recording as a WAV file. 4a. optionally, use ‘TiMIDIty’ to convert a non-copyright-encumbered MIDI tune to WAV, then import that and blend it with the speech (as a quiet b

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