shuttle

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shut·tle

(shŭt'ĕl),
A going back and forth regularly; used in respect to certain transport processes across a biomembrane.

shuttle

Space medicine
Any of the five—Columbia, Challenger, Discovery, Atlantis and Endeavour—reusable spacecraft that carried personnel and equipment into orbit, providing platform of the cutting-edge research critical in constructing the largest structure in space, the International Space Station. The first mission was launched in April 1981; the last space shuttle mission, STS-135, ended in July 2011.

shuttle

(shŭt′l)
To transport an object back and forth; in cell biology or biochemistry, to carry a molecule repeatedly across a cell membrane.

shuttle

the transport of electrons or organic groups across biological membranes.

shuttle system
means of transfer of reducing equivalents as NADH and H+ from the cytosol to mitochondria. The two main systems are: α-glycerophosphate shuttle and malate-aspartate shuttle.
References in classic literature ?
The second day he took refuge from benumbing unbelief, by getting into his loom and working away as usual; and before many hours were past, the minister and one of the deacons came to him with the message from Sarah, that she held her engagement to him at an end.
It was the same with him as the first one; he looked and looked, but because there was nothing on the empty loom he could see nothing.
Ah, before that weary siege of Troy, I used to hear the buzzing loom and the women's voices under my own roof.
She shall grow old in my house at Argos far from her own home, busying herself with her loom and visiting my couch; so go, and do not provoke me or it shall be the worse for you.
We had perceived the loom of the mountains about sunset; so that after running all night with a very light breeze, we found ourselves close in with the island the next morning, but as the bay we sought lay on its farther side, we were obliged to sail some distance along the shore, catching, as we proceeded, short glimpses of blooming valleys, deep glens, waterfalls, and waving groves hidden here and there by projecting and rocky headlands, every moment opening to the view some new and startling scene of beauty.
I have a curious fancy To see you in this wonder of the loom Amidst the noble ladies of the court, A flower among flowers.
But he had scarcely gone five hundred paces when he saw four mules and then a carriage, loom up from behind a little hill.
The loom of the oar kicked Harvey under the chin and knocked him backward.
Children should not see a carpet on the loom till the pattern is made plain.
We stumbled slowly along in the darkness, with the black loom of the craggy hills around us, and the yellow speck of light burning steadily in front.
It threw a livid, unnatural circle upon the floor, while in the shadows beyond we saw the vague loom of two figures which crouched against the wall.
But as the mileage lessened between her and the spot of her pilgrimage, so did Tess's confidence decrease, and her enterprise loom out more formidably.