a-m877515 - a likely a-rcy allele with a low mutability pattern --Peter A. Peterson The mutability occurs in the absence of En, and Cy is implicated. This is based on the absence of En in 10/10 cases of a mutability and the presence of Cy in 6/6 cases of a mutability. A reconstruction test has not been completed. The mutability pattern is a very low type (very late, infrequent spots). This is surprising because in an associated test, this same Cy gives a very strong effect (the standard high frequency, late spots) on bz-rcy. This would indicate that the receptor elements are responding differently to the same Cy, either because of a size difference or a positional alteration.

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