Sentence examples for most ancient cells from inspiring English sources
Saying that polarizing phylogeny is 'incredibly difficult' is an exaggeration, but not one that in any way contradicts my assertion that positioning the root and establishing the properties of the most ancient cells is the most difficult phylogenetic problem.
Despite great advances in clarifying the family tree of life, it is still not agreed where its root is or what properties the most ancient cells possessed – the most difficult problems in phylogeny.
Indeed, they can be connected with the most ancient of cell structures, the membrane with the cortical cytoskeleton.
Translation is one of the most ancient processes in the cell and previous studies have shown that these proteins have a high average connectivity [ 27, 41].
In fact, in evolutionary terms Chk1 is considered the most ancient of the major cell cycle control kinases [ 59], which functions in a pathway downstream of a PIKK family member that is part of the damage sensing machinery [ 58].
Moreover, ribosomal protein genes are one of the most ancient classes of gene in the cell [ 41], and, significantly, an evolutionary history dominated by vertical descent is apparent for this class of genes [ 42].
The ABEV taxonomic group includes 229 FSFs that are encoded by both sampled viruses and cells and is the most ancient group with a median nd of 0.2324.
The ribosome, which synthesizes proteins in cells, is one of the most ancient molecular machines in all living systems.
Interestingly, V-H+ATPases and ATPsynthases, which are capable of creating proton gradients across the cell membranes, are among the most ancient protein structures that are known [ 23].
The point of the article in Development was that proteins from both Xenopus and the axolotl can signal mouse stem cells to keep dividing indefinitely, which means that what we value in human stem cells is occurring in amphibians, the most ancient land vertebrates.
Although many of these functions are species specific, regulation of stem cell proliferation appears to be the most ancient and well-conserved function of PUF proteins.
