In comparison, key protein-dominant markers (in particular at 2966 cm−1) are shown to be down regulated in LNCaP cancer (C\documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\downarrow$$\end{document}) indicating increased protein metabolism in AR-positive LNCaP. This evidence concerns the gene AR and cancer.