De-sialylation of PrP^C reduces species barrier in PMCAb.

<p><b>A.</b> 263K or HY brain materials were diluted 10³-fold into 10% mouse dsNBH or NBH and subjected to ten serial PMCAb rounds with 5-fold dilution between rounds. Prior to electrophoresis, samples were treated with PK. Blots were stained with Ab3531 antibody. <b>B.</b> 22L or ME7 brain material was diluted 10³-fold into 10% hamster dsNBH or NBH and subjected to ten serial PMCAb rounds with 5-fold dilution between rounds. Prior to electrophoresis samples were treated with PK. Blots were stained with 3F4 antibody. Black and white triangles mark diglycosylated and monoglycosylated forms, respectively. <b>C.</b> PK-resistance profile illustrating relative representation of di-, mono-, and unglycosylated glycoforms in 263K-seeded PMCAb products produced in three reactions with mouse NBH (bold solid lines) or dsNBH (dashed lines).