Son of Sevenless Protein, Drosophila |
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| Drosophila SOS Protein; Drosophila Son of Sevenless Protein; Protein, Drosophila SOS; SOS Protein, Drosophila | |
| A guanine nucleotide exchange factor from DROSOPHILA. Sevenless refers to genetic mutations in DROSOPHILA that cause loss of the R7 photoreceptor which is required to see UV light. | |