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A second version of the central dogma is popular but incorrect. This is the simplistic DNA → RNA → protein pathway published by James Watson in the first edition of The Molecular Biology of the Gene (1965). Watson's version differs from Crick's because Watson describes a two-step (DNA → RNA and RNA → protein) process as the central ...
Comparing and aligning RNA, protein, and DNA sequences. Identification of promoters and finding genes from sequences related to DNA. Interpreting the expression-gene and micro-array data. Identifying the network (regulatory) of genes. Learning evolutionary relationships by constructing phylogenetic trees. Classifying and predicting protein ...
Watson and Alexander Rich discussed in the PNAS, saying, "We shall not be able to check a structural relationship between RNA and protein synthesis or between RNA and DNA until we know the structure of RNA." [5] Evidences had been accumulating since the 1940s that protein synthesis occurs simultaneously with increased level of RNA in the cytoplasm.
By comparing whole genome sequences, researchers gain insights into genetic relationships between organisms and study evolutionary changes. [2] The major principle of comparative genomics is that common features of two organisms will often be encoded within the DNA that is evolutionarily conserved between them.
Modifications to histone proteins and their DNA are classified as quaternary structure. Condensed chromatin, heterochromatin, prevents transcription of genes. In other words, transcription factors cannot access wound DNA-[6] This is in contrast to euchromatin, which is decondensed, and therefore, readily accessible to the transcriptional machinery.
Given the difference in widths of the major groove and minor groove, many proteins which bind to DNA do so through the wider major groove. [6] Many double-helical forms are possible; for DNA the three biologically relevant forms are A-DNA, B-DNA, and Z-DNA, while RNA double helices have structures similar to the A form of DNA.
The primary structure of a biopolymer is the exact specification of its atomic composition and the chemical bonds connecting those atoms (including stereochemistry).For a typical unbranched, un-crosslinked biopolymer (such as a molecule of a typical intracellular protein, or of DNA or RNA), the primary structure is equivalent to specifying the sequence of its monomeric subunits, such as amino ...
In accordance with the central dogma of molecular biology, RNA passes information between the DNA of a genome and the proteins expressed within an organism. [1] Therefore, from an evolutionary standpoint, a mutation within the DNA bases results in an alteration of the RNA transcripts, which in turn leads to a direct difference in phenotype.