R. H. Richardson

TL;DR: Zymogram analysis of individual flies for electrophoretic mobility or qualitative activity differences gives a good first approximation of the underlying genetic situation for a different class of variation than has previously been studied directly, but as Lewontin and Hubby3 have pointed out, the randomness of the samples of loci studied by this technique is critical for broader generalizations which might be made from the findings in this class of locu.

TL;DR: Tissue specificity of the esterases of two closely related species, Drosophila aldrichi and D. mulleri, is determined by starch gel electrophoresis of dissected tissues and organs and an esterase staining technique.

TL;DR: Two closely related species, Drosophila aldrichi and D. mulleri, are compared on the basis of their esterase isozyme patterns after starch gel electrophoresis and comparable esterases between the two species are identified.

TL;DR: The average mobility of electromorphs at an enzyme locus in a single population was defined as the weighted average mobility in that population, where the electromorph frequencies are the weights, and a derivative distance measure was defined whose taxonomic utility was determined in the Drosophila mulleri species complex.

TL;DR: The reanalysis using the approach derived in this paper confirmed the reproductive isolation of these two species, and hinted at the possibility of further subdivision within D. propachuca, two sibling species within the mulleri complex of the repleta group.