I’m writing to you to submit information I thought would be useful to the Drosophila community to add to the flybase website. I’ve been sequencing robo mutations to find the causal change. I have identified two of the alleles (robo1 and robo4). I also found that the stock robo2 from bloomington (BL8756) has the same mutation as robo1. Here are the sequenced mutations: robo1 - Q411X (C1231T) robo4 - W478X (G1434A) == Justin Bosch Hariharan Lab UC-Berkeley