Rat Bone Marrow Progenitor Cells are derived from the tibias and femurs of 1-week old Sprague Dewley Rat. Rat Bone Marrow Progenitor Cells are grown in T25 tissue culture flasks pre-coated with gelatin-based solution for 2 min and incubated in�Creative Bioarray��Culture Complete Growth Medium generally for 3-7 days. Cultures are then expanded. Prior to shipping, cells are detached from flasks and immediately cryo-preserved in vials. Each vial contains at least 1x10^6�cells per ml and are delivered frozen.