 Cell Proliferation Kit I MTT instructions by Roche

Primary source: www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/191/466/11465007001.pdf

Verified locator: Manufacturer instructions, version 20, content version December 2020. Printed p. 3 names the MTT bromide reagent; §3.1 and Fig. 4 on printed p. 9 show yellow tetrazolium reduction to purple formazan, solubilization and multiwell optical measurement. Publisher-hosted document retains Roche kit branding.