code: public boolean mergeSequence(SubunitCluster other, SubunitClustererParameters params) throws CompoundNotFoundException {
  		PairwiseSequenceAlignerType alignerType = PairwiseSequenceAlignerType.LOCAL;
  		if (params.isUseGlobalMetrics()) {
  			alignerType = PairwiseSequenceAlignerType.GLOBAL;
  		}
  		return mergeSequence(other, params,alignerType
  				, new SimpleGapPenalty(),
  				SubstitutionMatrixHelper.getBlosum62());
  	}
docs: Merges the other SubunitCluster into this one if their representatives
  sequences are similar (according to the criteria in params).
  <p>
  The sequence alignment is performed using linear {@link SimpleGapPenalty} and
  BLOSUM62 as scoring matrix.
  
  @param other
  SubunitCluster
  @param params
  SubunitClustererParameters, with information whether to use local
  or global alignment, sequence identity and coverage thresholds.
  Threshold values lower than 0.7 are not recommended.
  Use {@link #mergeStructure} for lower values.
  @return true if the SubunitClusters were merged, false otherwise
  @throws CompoundNotFoundException