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Your letter dated May 8 was duly received. Thank you very much for your valuable suggestions.
We now try to work with leucinless [sic] 3375 and leucineless 8839. We have the idea of killing two birds with the same stone,
i.e. we mark the albino vs. wild strains with the two leucinless [sic] genes to ensure a heterocarytic condition for the study
of pigment nuclei relationship, and at the time we mark the two leucinless [sic] nuclei with albino and pink color respectively
so that a study of the dominance relationship of the two leucinless [sic] (which were found to be non-allelic) is possible.
For the time being, therefore we don't need your cultures 5450-a and 5531-15300a any more, particularly because the heterocaryon
of them is colorless instead of pink as expected. However someday we may need it, since as you see any exception in science
may be of great value.