+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Speculations on the evolution of the genetic code part 2

, : Speculations on the evolution of the genetic code part 2. Origins of Life 9(2): 133-136

An evolutionary scheme is postulated in which a primitive code, involving only guanine and cytosine, would code for glycine (GG), alanine (GC), arginine (CG) and proline (CC). From each of these amino acids and their codons, there evolves a family of related amino acids as the code expands. The 4 familes are: alanine valine, leucine, isoleucine, phenylalanine, tyrosine, methionine and tryptophan; proline, threonine and serine; arginine, lysine and histidine; and glycine, serine, cysteine, glutamic acid, glutamine, aspartic acid and asparagine. Except for the glycine relation to glutamic acid and aspartic acid, all amino acids are related by chemical similarities in their side chains. Glycine not having a side chain would permit a more complex set of substitutions.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 006461309

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Metz, James, M.; Devine, Pamela; Denittis, Albert; Jones, Heather; Hampshire, Margaret; Goldwein, Joel; Whittington, Richard, 2003: A multi-institutional study of internet utilization by radiation oncology patients. Purpose: Studies describing the use of the Internet by radiation oncology patients are lacking. This multi-institutional study of cancer patients presenting to academic (AC), community (CO), and veterans (VA) radiation oncology centers was designe...

Heermann, Ralf; Altendorf, Karlheinz; Jung, Kirsten, 1998: The turgor sensor KdpD of Escherichia coli is a homodimer. Escherichia coli responds to K+-limitation or high osmolarity by induction of the kdpFABC operon coding for the high affinity K+-translocating KdpFABC complex. Expression of the corresponding operon is controlled by the membrane-bound sensor kinas...

Friedman Virginia; Hunt Adrian P., 2004: Fossil pearls from the Upper Cretaceous of Texas. Pearls are natural gems that have excited the imagination of mankind since ancient times. Many cultures have treasured them throughout history and today they remain a sign of elegance and unsurpassed beauty. Fossil pearls are rare in the fossil re...

Melchior Paul J., 1955: Les divers aspects des marees terrestres. A theoretical and mathematical study of earth tides and their effects; includes discussion of the role of the geologic structure of the earth's crust in deformation.

Ren, Guohui; Doshi, Mona; Hack, Bradley K.; Alexander, Jessy J.; Quigg, Richard J., 2002: Isolation and characterization of a novel rat factor H related protein that is upregulated in glomeruli under complement attach. Journal of the American Society of Nephrology 13(Program and Abstracts Issue): 347A, September

Chai, Sergio-C; Bruyere, John-R; Maroney, Michael, J., 2006: Probes of the Catalytic Site of Cysteine Dioxygenase. The first major step of cysteine catabolism, the oxidation of cysteine to cysteine sulfinic acid, is catalyzed by cysteine dioxygenase (CDO). In the present work, we utilize recombinant rat liver CDO and cysteine derivatives to elucidate structura...

Martyniak A., 1990: Feeding of carp cyprinus carpio in the artificially aerated lake mutek czechoslovakia. In the paper 37 alimentary tracts of carp introduced into the lake were analysed. The main component of food was macrophytes constituting 65.7% of the total food mass. Among the food components of animal origin the weight share of the larvae of Ch...

Moussa, N.; Rouxel, O.; Nonnotte, P.; Fouquet, Y.; Ponzevera, E.; Etoubleau, J., 2011: Sulfur and strontium isotope study of hydrothermal mineralization from the SE Afar Rift. Epithermal mineralization was recently described in the SE Afar Rift (Republic of Djibouti). To infer fluid sources in hydrothermal veins, sulfur and strontium isotopic analyses were performed on thirty mineralized samples of chalcedony, and/or qu...

Anonymous, 2013: An Exploration of Apathy and Impulsivity in Parkinson Disease. Apathy and impulsivity in Parkinson disease (PD) are associated with clinically significant behavioral disorders. To explore the phenomenology, distribution, and clinical correlates of these two behaviors. Methods. In PD participants.

Compton T.; Courtney R.J., 1984: Virus specific glyco proteins associated with the nuclear fraction of herpes simplex virus type 1 infected cells. Journal of Virology 49(2): 594-597