Two Fully Referenced Alleles
	Exon 2		Exon 3		Exon 4
	Exon 2		Exon 3		Exon 4
full	270	+	276	+	276	=	822
part	0	+	0	+	0	=	0
unreferenced	0	+	0	+	0	=	0
One Partially Referenced Allele
	Exon 2		Exon 3		Exon 4
	Exon 2		Exon 3		Exon 4
full	270	+	276	+	0	=	546
part	0	+	0	+	276	=	276
unreferenced	0	+	0	+	0	=	0
Two Partially Referenced Alleles
	Exon 2		Exon 3		Exon 4
	Exon 2		Exon 3		Exon 4
full	270	+	276	+	0	=	546
part	0	+	0	+	0	=	0
unreferenced	0	+	0	+	276	=	276
Matching with Partially Referenced Alleles
The observed sequence covers exons 2, 3 and 4.
Observed	Exon 2		Exon 3		Y
There are four alleles in the library that match the observed sequence in exons 2 and 3.
Allele X*01	Exon 2		Exon 3		C
Allele X*02	Exon 2		Exon 3		G
Allele X*03	Exon 2		Exon 3		?
Allele X*04	Exon 2		Exon 3		?
We can reject some of the combinations by looking at the exon 4 sequence.
X*01 + X*02	Exon 2		Exon 3		C + G = S
This combination will give C + G = S in Exon 4 so we can reject it because the observed sequence is Y.
X*01 + X*03	Exon 2		Exon 3		C + ? = C, S, or Y
This combination might give C, S or Y in Exon 4. We cannot reject it because it might be a match.
X*02 + X*03	Exon 2		Exon 3		G + ? = G, S, or K
This combination might give G, S or K in Exon 4. We can reject it because it cannot give a Y.
X*03 + X*04	Exon 2		Exon 3		?
We don't know anything about exon 4. We cannot reject this allele pair because it might give a Y.