منابع مشابه
Go forth or multiply
A cell can move and reproduce, but it usually can't do both simultaneously. As Makagiansar et al. report on page 155, the pattern of phosphorylation on a membrane proteoglycan helps determine whether cells grow or go. The phosphory-lation differences direct the molecule to distinct parts of the cell membrane. Even cancer cells have to slow down before they can divide, as do normal progenitor ce...
متن کاملGo Forth and Multiply : Revisiting Religion and Fertility in the United States , 1984 - 2008 †
Many studies on the fertility differential by religion have considered both Catholics and Protestants to be equally homogenous groups. Contrary to these studies, we contend that Protestant fertility must be studied in the context of heterogeneous groups. Specifically, conservative Protestantism, with its beliefs about artificial birth control mirroring Catholic teaching, should be examined sepa...
متن کاملSkilled attendance at childbirth: let us go beyond the rhetorics.
Almost two decades into the Safe Motherhood Initiative, maternal mortality ratios of 500+ per 100 000 live births still being the rule rather than the exception in sub-Saharan Africa are no reason to celebrate (AbouZahr & Wardlaw 2003). Lukewarm political commitment, inadequate resource prioritization, competition between international agencies, major technical difficulties to accurately measur...
متن کاملKnowing when to let go
uring meiosis I, some mechanism must allow homologous chromosomes to separate while keeping sister chromatids paired until meiosis II. How does a cell make this distinction? On page 219, Rogers et al. propose that in C. elegans the aurora-B kinase AIR-2 is largely responsible for ensuring that cohesion between chromosomes breaks down at the proper place and time. The authors also identified add...
متن کاملCohesin resolves to let go
or microtubule asters, just as with life in general, sometimes you get stuck in a corner. And, say Cendrine Faivre-Moskalenko and Marileen Dogterom (FOM Institute for Atomic and Molecular Physics, Amsterdam, Netherlands), it can take a catastrophe to get things moving again. Dogterom has been trying to reproduce aster behavior in the minimal environment of a microfabricated chamber. Her beads, ...
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ژورنال
عنوان ژورنال: Nature
سال: 2005
ISSN: 0028-0836,1476-4687
DOI: 10.1038/438423a