desirable location". Gramicidin A has been described as a portable hole; it is a polypeptide with a helical shape. When it forms a dimer, it can embed itself in cellular bilayer membranes and form a hole through which water molecules can pass. The Museum of Modern Art has a work by Ben Vautier titled, The First Portable Hole (Le Premier trou portatif). In Shari Lewis presents 101 magic tricks for kids to do, a trick named "the portable hole" is described. A card trick titled Acme Portable Hole is available commercially. See also Hammerspace Bag of holding Teleportation in fiction Wormholes Portal (video game) References External links Cartoon physics Fictional objects