Which Is True of the Biphasic Hemolysin Usually Associated with Paroxysmal

question 14

Multiple Choice

Which is true of the biphasic hemolysin usually associated with paroxysmal cold hemoglobinuria (PCH) ?

• A)Anti-P that binds to red blood cells at body temperature but activates complement at cool temperatures
• B)Anti-P that binds to red blood cells at cool temperatures but activates complement at body temperature
• C)Anti-P1 that binds to red blood cells at body temperature but activates complement at cool temperatures
• D)Anti-P1 that binds to red blood cells at cool temperatures but activates complement at body temperature

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