+ /**
+ * @return The RNA of the sequence in the alignment
+ */
+
+ public RNA getRNA();
+
+ /**
+ * @param rna
+ * The RNA.
+ */
+ public void setRNA(RNA rna);
+
+ /**
+ *
+ * @return list of insertions (gap characters) in sequence
+ */
+ public List<int[]> getInsertions();
+
+ /**
+ * Given a pdbId String, return the equivalent PDBEntry if available in the
+ * given sequence
+ *
+ * @param pdbId
+ * @return
+ */
+ public PDBEntry getPDBEntry(String pdbId);
+
+ /**
+ * Get all primary database/accessions for this sequence's data. These
+ * DBRefEntry are expected to resolve to a valid record in the associated
+ * external database, either directly or via a provided 1:1 Mapping.
+ *
+ * @return just the primary references (if any) for this sequence, or an empty
+ * list
+ */
+ public List<DBRefEntry> getPrimaryDBRefs();
+
+ /**
+ * Returns a (possibly empty) list of sequence features that overlap the given
+ * alignment column range, optionally restricted to one or more specified
+ * feature types. If the range is all gaps, then features which enclose it are
+ * included (but not contact features).
+ *
+ * @param fromCol
+ * start column of range inclusive (1..)
+ * @param toCol
+ * end column of range inclusive (1..)
+ * @param types
+ * optional feature types to restrict results to
+ * @return
+ */
+ List<SequenceFeature> findFeatures(int fromCol, int toCol, String... types);
+
+ /**
+ * Method to call to indicate that the sequence (characters or alignment/gaps)
+ * has been modified. Provided to allow any cursors on residue/column
+ * positions to be invalidated.
+ */
+ void sequenceChanged();
+
+ /**
+ *
+ * @return BitSet corresponding to index [0,length) where Comparison.isGap()
+ * returns true.
+ */
+ BitSet getInsertionsAsBits();