The alpha6beta4 integrin promotes carcinoma in-vasion by its activation of a phosphoinositide 3-OH (PI3-K) signaling pathway (Shaw, L.M., I. Rabinovitz, H.H.-F. Wang, A. Toker, and A.M. Mercurio. Cell. 91: 949-960). We demonstrate here using MDA-MB-435 breast carcinoma cells that alpha6beta4 stimulates chemotactic migration, a key component of invasion, but that it has no influence on haptotaxi...

Nerve cell bodies in the spiral and vestibular ganglia of the adult rat are surrounded by thin (about ten lamellae) myelin sheaths which differ in several respects from typical axonal myelin. In some instances lamellae surrounding perikarya appear as typical major dense lines, and in others as thin Schwann cell sheets in which cytoplasm persists. Discontinuities and irregularities appear in the...

Among the possible sources of environmental contamination by plant protection products, the use of air blast sprayers in orchards and vineyards can be very critical. The evaluation of the vertical distribution pattern is a crucial test to achieve a good quality of spray application. The aim of the paper was to compare the performance of a vertical lamellate patternator versus a horizontal lamel...

A cytoplasmic structure exhibiting a peculiar configuration of agranular reticulum has been found in the rat pinealocyte, and has been designated a canaliculate lamellar body. It consists of a number of fenestrated, flat cisternae which are closely spaced. They bear some distant resemblance to the annulate lamellae previously reported in a variety of cell types. Profiles of stacks of lamellae i...

A scaling analysis of equilibrium orientation of diblock copolymer molecules on fractal surfaces and a brief comparison with a particular experiment is presented in this paper. This work is motivated by a recent experimental finding that a diblock copolymer film of polystyrene-PMMA, when deposited on a rough substrate, can orient its lamellae from a parallel to a perpendicular configuration dep...

The a 6 b 4 integrin promotes carcinoma invasion by its activation of a phosphoinositide 3-OH (PI3-K) signaling pathway (Shaw, L.M., I. Rabinovitz, H.H.-F. Wang, A. Toker, and A.M. Mercurio. Cell . 91: 949–960). We demonstrate here using MDA-MB-435 breast carcinoma cells that a 6 b 4 stimulates chemotactic migration, a key component of invasion, but that it has no influence on haptotaxis. Stimu...

The proteins from both grana and stroma lamellae of maize (Zea mays) mesophyll plastids and from maize bundle sheath plastid membranes have been compared by electrophoresis in sodium dodecyl sulfate-polyacrylamide gels using a discontinuous buffer system. Peptide differences between grana and stroma lamellae were essentially quantitative and not qualitative. Bundle sheath plastid membrane pepti...