When comparing serologies antigen vs allele mismatches are determined as follows.
When comparing DNA typing for both patients and donors, the following rules are applied:
- When serology has been assigned for the DNA typing for both donor and patient, then the logic in the table above is applied.
- When no serology is known the following logic is applied:
- Any DPB1 mismatch is considered an Antigen mismatch. Therefore there cannot be any allele mismatches
- When C* typing has a first field of higher than 10 → the first field is considered the Antigen
- Any other locus without assigned serology → the first field is considered the Antigen.