From 6ddce421ad67f5fd7c83ba0419f6076ae45034a5 Mon Sep 17 00:00:00 2001
From: Haoyu Cheng <hcheng@jimmy.harvard.edu>
Date: Thu, 26 Dec 2019 16:05:25 -0500
Subject: [PATCH] REDME

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index bd8ef6b..f872a9d 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ Hifiasm is a standalone and lightweight assembler, which does not need external
 |<sub>[Human HG002]<sub>|<sub>3Gb<sub>|<sub>x43<sub>|<sub>-k 40 -t 42 -r 2<sub>|<sub>?405h<sub>|<sub>?10h12m<sub>|<sub>?122G<sub>|<sub>320kb/29Mb<sub>|
 |<sub>[Human CHM13]<sub>|<sub>3Gb<sub>|<sub>x27<sub>|<sub>-k 40 -t 42 -r 2<sub>|<sub>?<sub>|<sub>?<sub>|<sub>?<sub>|<sub>NA<sup>[2]</sup>/39.8Mb<sub>|
 |<sub>[Butterfly]<sub>|<sub>358Mb<sub>|<sub>x35<sub>|<sub>-k 40 -t 42 -r 2 -z 20<sub>|<sub>17.1h<sub>|<sub>36m<sub>|<sub>16G<sub>|<sub>NA<sup>[3]</sup>/7.5Mb<sub>|
-
+<sub>[1] unitig N50 is the N50 of assembly graph with haplotype information (i.e., bubbles), while the contig N50 is the N50 of haplotype collapsed assembly (i.e., without bubbles).<sub>
 
 <style>
   .markdown-body table td {