Natural evolution screening strategies

The direction of evolution is dictated by the experimenter in the form of a screen (or selection) for the desired phenotype. Screening strategies are discussed below and in more detail by Gershenson and Arnold (2000). The single-step nature of the evolutionary walk, however, also places some limitations on the properties that can be evolved. Properties (or combinations of properties) that require multiple, simultaneous amino acid substitutions will not be acquired. 

Based on these arguments, we developed the simple directed evolution strategy illustrated in Fig. 1 [2, 6], In comparison to the enzyme performing a function for which it is selected in nature, the new job is performed poorly indeed. Beneficial mutations will be identified during screening the products of... 

Darwinian evolution is kept in motion by a continual succession of newly arising variation and its modification by natural selection. The search for active substances proceeds through multiple-component simultaneous procedures, in which a restricted variant population is prepared on a microscale by a combinatorial strategy, to be subjected to the new form of selection, that is, collective screening. After a successfully applied unnatural selection of a particular variant with the desired properties, synthesis on a macroscale can take place. In Section 1.4.2.2.1 a static variation is going to be prepared and screened for anti-inflammatory... 

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