... information is accurately passed between cell generations. Both of these processes create fluctuating energy demands that necessitate metabolic plasticity to facilitate replication of genetic material and (proto)cell division. We propose that LUCA possessed rudimentary forms of these capabilities. Since LUCA...

... ; Boonekamp et al., 2013 ; Bauch et al., 2014 ; Wilbourn et al., 2018 ). Telomeres shorten with cell division, and generally shorten fastest during organismal growth ( Rufer et al., 1999 ; Baerlocher et al., 2007 ; Boonekamp et al., 2014 ; Vedder et al., 2017a ). Whether the effect of growth on telomere...

... from the extracellular space remains unclear. Using two well-characterized cell types from the sea urchin,we show that extracellular mixtures of the constitutive and inducible forms of the 70 kDa heat shock proteins (Hsc70 and Hsp70, respectively) have dramatic effects on initiation of cell division...