The death domain and death effector domain are two common motifs that mediate protein-protein interactions between components of cell death signaling complexes. The mechanism by which these domains engage their binding partners has been explored by extensive mutagenesis of two death adaptors, FADD and TRADD, suggesting that a death adaptor can discriminate its intended binding partners from oth...

As pollen tubes grow toward the ovary, they are in constant contact with the pistil extracellular matrix (ECM). ECM components are taken up during growth, and some pistil molecules exert their effect inside the pollen tube. For instance, the Nicotiana alata 120-kD glycoprotein (120K) is an abundant arabinogalactan protein that is taken up from the ECM; it has been detected in association with p...

Embryonic chimera production was used to study the developmental processes of the mouse nervous system. The difficulty of performing in situ transplantation experiments of neural primordium of mouse embryo was overcome by isotopic and isochronic grafting of mouse neural tube fragments into chick embryo. Mouse neural tube cells differentiated perfectly in ovo and neural crest cells associated wi...

A major 43 kDa protein from the protective tube of Riftia pachyptila (Vestimentifera), named RP43, was partly microsequenced after isolation by SDS/PAGE from the protein fraction of tubes collected around the hydrothermal vents at the East Pacific Rise. On the basis of the partial peptide sequences obtained, experiments using reverse-transcriptase-mediated PCR and rapid amplification of cDNA en...

The trans-Golgi network (TGN) plays a central role in cellular secretion and has been implicated in sorting cargo destined for the plasma membrane. Previously, the Arabidopsis (Arabidopsis thaliana) echidna (ech) mutant was shown to exhibit a dwarf phenotype due to impaired cell expansion. However, ech also has a previously uncharacterized phenotype of reduced male fertility. This semisterility...

In this paper spherically symmetric, nonasymptotically flat solutions to 5D Kaluza-Klein theory, with “electric” and/or “magnetic” fields are investigated. It is shown that the global structure of the spacetime depends on the relation between the “electrical” and “magnetic” Kaluza-Klein fields. For small “magnetic” field we find a wormhole-like solution located between two null surfaces. As the...

fluoride tubes, the absolute insulin values would be incorrect. The fact that blood collected in an oxalatefluoride tube is more severely hemolyzed is emphasized by the data in Figure 1 and Table 2. In the comparison of insulin and hemoglobin levels in two different plasma tubes, it is obvious that samples collected in tubes containing EDTA are more suitable for accurate insulin analysis than w...

Drop-in of R-22 alternatives in refrigeration and air conditioning systems requires a redesign of system components to improve system performance and reliability with the alternative refrigerants. The present paper aims at design adiabatic capillary tubes for R-22 alternatives such as R-417A, R-422D and R-438A. A theoretical model has been developed and validated with the available experimental...

Background. Mature cystic teratomas of the fallopian tube are extremely rare and only 54 cases have been reported in the literature. In this paper, we report a mature cystic teratoma of the fallopian tube in a postmenopausal woman and we report the review of literature of tubal cystic teratomas. Case. A 62-year-old, gravida 4 postmenopausal woman presented with pain in the right lower abdominal...

Higher “plants minimize their exposure to pollen from diverse species by precise regulation of flowering time, development of floral organs, and interactions with specific pollinators. These measures do not guarantee success, however, because of the vast quantities of pollen in the environment. Consequently, to ensure that only the appropriate sperm are delivered to the eggs, many plants have e...