MAN1A1 and neoplasm: Further evaluating the microarray data of the scid and the select group, we observed that many genes which are crucial for glycosylation show an altered expression: for example, MAN1A1, MAN2A1, and GALNT 5 and 7 were downregulated in Fra-2 cl 1 scid primary tumours, whereas MGAT4A was upregulated.