Immunohistochemistry on centrifuge preparations of HL cell lines. Representative photomicrographs of positive immunohistochemistry staining on centrifuge preparations of HL cell lines for 6 proteins: cathepsin C on L1236 (A), CD100 on KMH2 (B), CD150 on L1236 (C), CD63 on L428 (D), CD71 on KMH2 (E), and IL25 on L1236 (F). Photomicrographs were taken using Aperio ScanScope System and were acquired with Digital Slide Information Management Software (Aperio Technologies, Vista, CA). Image layout was subsequently processed by Microsoft Office XP PowerPoint (Microsoft, Seattle, WA; A-F, original magnifications, ×400).