Specificity distinction

Oligopeptide transport in Escherichia coli. Specificity with respect to side chain and distinction from dipeptide transport.

A lysine auxotroph of Escherichia coli W can use lysine oligopeptides as a source of the required amino acid. A mutant, defective in oligopeptide transport, was isolated from this strain with the use of resistance to the bactericidal action of triornithine as a selection procedure. The triornithine-resistant mutant could no longer grow upon lysine oligopeptides. In an analogous manner a triorni...

Oligopeptide Transport in Escherichia coli SPECIFICITY WITH RESPECT TO SIDE CHAIN AND DISTINCTION FROM DIPEPTIDE TRAKSPORT*

A lysine auxotroph of Escherichia coli W can use lysine oligopeptides as a source of the required amino acid. A mutant, defective in oligopeptide transport, was isolated from this strain with the use of resistance to the bactericidal action of triornithine as a selection procedure. The triornithine-resistant mutant could no longer grow upon lysine oligopeptides. In an analogous manner a triorni...

The Distinction

When we disagree, we want our disagreements to be substantive. Substantive disagreements require agreement on what the disagreement is about, which in turn requires mutual understanding. Lack of mutual understanding comes from two kinds of defects: hidden differences in how the parties understand some expression, or hidden differences in what they take to be the context in which their views are...

Distinction Networks

Intelligent systems can be modeled by organizationally closed networks of interacting agents. An interesting step in the evolution from agents to systems of agents is to approach logic itself as a system of autonomous elementary processes called distinctions. Distinction networks are directed acyclic graphs in which links represent logical implication and nodes are autonomous agents which act i...

Immunological specificity of Staphylococal penicillinase