منابع مشابه
Molecules and Mechanisms
The usefulness of post-operatively serial serum CA15-3 determination with CEA and TPA was evaluated in a group of 285 breast cancer patients. In particular, the CAI 5-3 sensitivity to 'early' diagnosis and monitoring of the response to treatment of breast cancer relapses, was compared with those of the two other markers in order to'define the most suitable association. Moreover, in a group of 1...
متن کاملT lymphocyte trafficking: molecules and mechanisms.
Coordinated migratory events are required for the development of effective and regulated immunity. Naïve T lymphocytes are programmed to recirculate predominantly in secondary lymphoid tissue by non-specific stimuli. In contrast, primed T cells must identify specific sites of antigen location in non-lymphoid tissue to exert targeted effector responses. Following priming, T cells acquire the abi...
متن کاملMechanisms and Molecules of the Mitotic Spindle
In all eukaryotes, morphogenesis of the microtubule cytoskeleton into a bipolar spindle is required for the faithful transmission of the genome to the two daughter cells during division. This process is facilitated by the intrinsic polarity and dynamic properties of microtubules and involves many proteins that modulate microtubule organization and stability. Recent work has begun to uncover the...
متن کاملMechanisms controlling the shedding of transmembrane molecules.
Although the number of cell-surface transmembrane molecules known to release their extracellular domain to the cell media has grown greatly during past years, the protease(s) involved have remained elusive until recently. The analysis of ectodomain shedding of proteins as diverse as membrane-anchored growth factors, such as pro-transforming growth factor a (proTGF-a) and pro-tumour necrosis fac...
متن کاملMechanisms of positron annihilation on molecules
The aim of this work is to identify the mechanisms responsible for very large rates and other peculiarities observed in low-energy positron annihilation on molecules. The two mechanisms considered are: (i) Direct annihilation of the incoming positron with one of the molecular electrons. This mechanism dominates for atoms and small molecules. I show that its contribution to the annihilation rate...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1995
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.103-1519248