/* ===========================================================================
*
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*               National Center for Biotechnology Information
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#ifndef __BLAST_DEGEN__
#define __BLAST_DEGEN__

/* Ambiguous residues are defined using this structure */
typedef struct blast_degen_list {
		int		cnt;		/* no. of letters this chr subsumes */
		BLAST_LetterPtr	list; /* list of matching residues */
	} BLAST_DegenList, PNTR BLAST_DegenListPtr;

typedef struct blast_degenmap {
		BLAST_DegenListPtr	degen; /* degen put first for faster accessing */
		BLAST_AlphabetPtr	ap;
		BLAST_AlphaMapPtr	amp12, amp21;
		BLAST_DegenListPtr	_degen; /* to satisfy Purify */
		struct blast_degenmap PNTR	next;
	} BLAST_DegenMap, PNTR BLAST_DegenMapPtr;

BLAST_DegenMapPtr LIBCALL BlastDegenMapFind PROTO((BLAST_AlphabetPtr ap));

#endif /* !__BLAST_DEGEN__ */