after incorporation into a polyacrylamide matrix , the biopolymers dna , rna , heparin , hyaluronic acid , collagen and the synthetic polymers poly ( u ) and poly ( a , u ) were stained with the pure thiazine dyes , methylene blue , the azures and thionin alone and combined with eosin y .
C0005554
biopolymers
C0009325
collagen