diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
index 37f348c..8fa34c3 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/GraphVertexOperation.java
@@ -24,7 +24,7 @@
 import edu.uci.ics.pregelix.type.KmerCountValue;
 
 public class GraphVertexOperation {
-	public static final int k = 15; //kmer, k: the length of kmer
+	public static final int k = 55; //kmer, k: the length of kmer
 	static private final Path TMP_DIR = new Path(
 			GenerateSequenceFile.class.getSimpleName() + "_INTERIM");
 	/**
diff --git a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
index 5ccaae5..30e6b9a 100644
--- a/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
+++ b/genomix/genomix-pregelix/src/main/java/edu/uci/ics/pregelix/TestLoadGraphVertex.java
@@ -94,6 +94,7 @@
 	 * @param args
 	 */
 	public static void main(String[] args) throws Exception {
+		//final int k = Integer.parseInt(args[0]);
         PregelixJob job = new PregelixJob(MergeGraphVertex.class.getSimpleName());
         job.setVertexClass(TestLoadGraphVertex.class);
         /**