Uncommon Descent Serving The Intelligent Design Community

Popcorn: watching kinesin in action, as we digest that Christmas turkey and pudding . . .


Sometimes, seeing is believing.

Here is a nice, short summary of the kinesin microtubule highway “walking truck” protein in action:

[youtube lLxlBB9ZBj4]

This vid gives a bit of context:

[youtube 8RULvE9rw6Y]

Especially notice the role played by Brownian motion, and that played by ATP.

So, post turkey and pudding vid no 3: ATP Synthase in action:

[youtube KU-B7G6anqw]

Walking trucks in the cell, fuelled by batteries made in a molecular factory that uses a nanotech motor  . . .

And, a highway network that has to go where it is needed, with need for directions — that delivery truck has to know where to go, when!

And the best explanation for all of this functionally specific, complex organisation and required information is . . . ?


I guess it would be helpful to reflect here on Denton’s classic word-picture:

. . . To grasp the reality of life as it has been revealed by molecular biology, we must magnify a cell a thousand million times until it is twenty kilometers in diameter [[so each atom in it would be “the size of a tennis ball”] and resembles a giant airship large enough to cover a great city like London or New York. What we would then see would be an object of unparalleled complexity and adaptive design. On the surface of the cell we would see millions of openings, like the port holes of a vast space ship, opening and closing to allow a continual stream of materials to flow in and out. If we were to enter one of these openings we would find ourselves in a world of supreme technology and bewildering complexity. We would see endless highly organized corridors and conduits branching in every direction away from the perimeter of the cell, some leading to the central memory bank in the nucleus and others to assembly plants and processing units. The nucleus itself would be a vast spherical chamber more than a kilometer in diameter, resembling a geodesic dome inside of which we would see, all neatly stacked together in ordered arrays, the miles of coiled chains of the DNA molecules. A huge range of products and raw materials would shuttle along all the manifold conduits in a highly ordered fashion to and from all the various assembly plants in the outer regions of the cell.
We would wonder at the level of control implicit in the movement of so many objects down so many seemingly endless conduits, all in perfect unison. We would see all around us, in every direction we looked, all sorts of robot-like machines . . . . We would see that nearly every feature of our own advanced machines had its analogue in the cell: artificial languages and their decoding systems, memory banks for information storage and retrieval, elegant control systems regulating the automated assembly of components, error fail-safe and proof-reading devices used for quality control, assembly processes involving the principle of prefabrication and modular construction . . . . However, it would be a factory which would have one capacity not equaled in any of our own most advanced machines, for it would be capable of replicating its entire structure within a matter of a few hours . . . .
Unlike our own pseudo-automated assembly plants, where external controls are being continually applied, the cell’s manufacturing capability is entirely self-regulated . . . .

[[Denton, Michael, Evolution: A Theory in Crisis, Adler, 1986, pp. 327 – 331. This work is a classic that is still well worth reading. Emphases added. (NB: The 2009 work by Stephen Meyer of Discovery Institute, Signature in the Cell, brings this classic argument up to date. The main thesis of the book is that: “The universe is comprised of matter, energy, and the information that gives order [[better: functional organisation]  to matter and energy, thereby bringing life into being. In the cell, information is carried by DNA, which functions like a software program. The signature in the cell is that of the master programmer of life.” Given the sharp response that has provoked, the onward e-book responses to attempted rebuttals, Signature of Controversy, would also be excellent, but sobering and sometimes saddening, reading.) ]

And, again, you say the best explanation is . . . ? END

Happy Christmas viewing to all! kairosfocus

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