Hi, I am analysing some RNA-seq data and have two different datasets, total RNA plus enzyme and total RNA minus enzyme. I used to type in "column join" in the "Tools" menu on the Galaxy homepage after uploaded the files in Text delimited format. Column join allowed me to join two datasets by a hinge column, in this case I would choose column 1 which would be the chromosome position. I would also be allowed to fill empty columns with a value of 1. The output would give me 3 columns, chromosome number (which both datasets shared), reads for minus enzyme, and reads for plus enzyme. The function would never reject any chromosome position with reads in one dataset and not the other. However, I cannot seem to be able to find this function anymore, and the new function "Join two datasets" seems to only give me back rows where both plus and minus datasets have reads. Does anyone else have this problem or know how I could get around it? Regards, Justin ---------------------------------- Justin Clarke McDowall Laboratory Garstang 8.52/8.51 Faculty of biological sciences University of Leeds Leeds LS2 9JT