Subgrouping expression profiles of GH pituitary adenomas Hello Everybody, I am going to subgroup GH (Growth hormone releasing) pituitary adenomas according to their expression profiles by microarray and RT-qPCR. I do have 50 GH pituitary adenomas to subgroup and i wonder should i run all these 50 adenomas in the microarray to check their expression profiles or should i only take for example 5 of them to run in the microarray since they probably must have almost the same expression profiles? You know if i run all the 50 adenomas then it would take alot of time. :yuck: What do you usually do when you have to subgroup a group of related things like in this case GH (Growth hormone releasing) pituitary adenomas? Thanks for any input.