Answers are grounded in this paper and cite their sources.
We isolated defective specialized transducing phages of SP beta that carry one of the extracistronic suppressors, sup-3 or sup-44. Lysates containing these phages can be used in a simple spot test to determine whether an auxotrophic mutation can be suppressed. The sup-3 and sup-44 mutations are distinct, in that their suppression patterns differ for the markers hisA1, metC3, and thr-5; and they are not alleles.
No takes yet. Share an insight, caveat, or question.
Lipsky et al. (1981) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: