Table 3Position penalties for SSP nucleotide mismatches

5'1817161514131211109876543213'
0.03 0.03 0.03 0.03 0.03 0.04 0.04 0.05 0.05 0.06 0.07 0.12 0.17 0.21 0.25 0.30 0.50 0.90
PrimerTTTCTTCAC C TCCGTGTC
DNA templateTTTCTTCAC A TCCGTGTC

Match score calculation for SSPs.
An 18-mer primer anneals to a mismatched DNA. Primer and template are shown in the sense orientation. The substitution of C with A leads to the mismatch C-T with a penalty of 0.94 (refer to Table 2).
This position has a 6% influence on the overall probe reactivity.
The overall probe score is 1 − (0.06 × 0.94) = 0.94.

From: Chapter 11, The Major Histocompatibility Complex Database, dbMHC

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