[Anti-f]

Thank you for the explanation. Your explanation does help me understand it better. I hard a hard time finding in depth information on f. 

[Anti-f]

So, Brenda, when you say the R1R2 people are the ones you would expect to form an anti f is it because of the position of the c and e?  I’m trying to wrap my head around anti f. We have a patient who our reference lab identified an anti f and the patient is R1R2.