ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] If anything, the large number of protein structures and amino acid sequences now known has confused rather than simplified the main issue of whether extant proteins have evolved from a small number of ancestral precursors or have arisen independently. When the amino acid sequences are closely ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/290334a0