In Southgate's Mucicarmine technique, what are the results for glycogen, neutral mucin, and acid mucin?

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Multiple Choice

In Southgate's Mucicarmine technique, what are the results for glycogen, neutral mucin, and acid mucin?

Explanation:
In this technique, mucicarmine specifically stains acidic mucins magenta, while neutral mucins and glycogen are not stained by the mucicarmine stain used in Southgate’s method. Acid mucins contain sulfated or carboxylated mucopolysaccharides that bind the dye, giving a magenta color. Neutral mucins lack these groups, so they remain unstained, and glycogen isn’t targeted by this stain at all, so it also remains negative. Therefore the expected pattern is glycogen negative, neutral mucin negative, acid mucin positive.

In this technique, mucicarmine specifically stains acidic mucins magenta, while neutral mucins and glycogen are not stained by the mucicarmine stain used in Southgate’s method. Acid mucins contain sulfated or carboxylated mucopolysaccharides that bind the dye, giving a magenta color. Neutral mucins lack these groups, so they remain unstained, and glycogen isn’t targeted by this stain at all, so it also remains negative. Therefore the expected pattern is glycogen negative, neutral mucin negative, acid mucin positive.

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