public void set(String seqStr) {
		if( seqStr == null ) {
			length = 0;
			nmer = 0;
		} else {
			nmer = 0;
			setLength(seqStr.length());

			// Create binary sequence
			char seqChar[] = seqStr.toCharArray();
			int i;
			for( i = 0; i < length; i++ )
				rol(seqChar[i]);
		}
	}