Zyagen offer frozen sagittal sections containing most rat brain major regions from olfactory bulb to cerebellum. Brains are snapped frozen in OCT, sectioned in sagittal orientation at the medline at a thickness of 7-10 microns, and sections mounted on positively charged slides. Each slide contains 2 sections. Frozen sections are shipped in tightly closed slide boxes or slide mailers on dry ice. Brain frozen sagittal sections of rats perifused with 10% neutral buffered formalin or 4% paraformeldehyde are also available upon request. Sections are made under RNase- and protease-free conditions and are ideal for immunohistochemistry and in situ hybridization.