FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
The RP2 lineage is duplicated in gsbunspecified embryos. The missing RP2 lineage phenotype of Df(2L)slp-Δ34B embryos is unaffected if the embryos are also carrying gsbunspecified.