Introduction

Metanyl yellow, solution is a part of Mucicarmine kit that is used for visualizing acid mucopolysaccharides (mucins). Using this kit can be very useful when diagnosing the type of tumor (according to the tumor mucin secretion). It is also used in microbiology for identifying microorganisms based on cellular membrane coloration, but that is limited to the microorganisms that have complete cellular membrane (or partially) consisting of polysaccharides.