From 4a45b221d70d11498c4de5aea86af5f23622c6c6 Mon Sep 17 00:00:00 2001
From: Nico Maillet <nicolas.maillet@pasteur.fr>
Date: Mon, 18 Dec 2023 09:52:20 +0100
Subject: [PATCH] add a link in comment

---
 rpg/core.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rpg/core.py b/rpg/core.py
index 2f58c6c..37c63b1 100644
--- a/rpg/core.py
+++ b/rpg/core.py
@@ -31,7 +31,6 @@ AMINOACIDS = ["A", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N",
               "#", "*"]
 """All character accepted in a peptide."""
 
-
 AA_MASS_AVERAGE = {"*" : 0.0,
                    "A" : 71.0788,
                    "C" : 103.1388,
@@ -90,7 +89,9 @@ AA_MASS_MONO =  {"*" : 0.0,
                   "X" : 0.0,
                   "Z" : 0.0,
                   "#" : 0.0}
-""" Monoisotopic mass of all amino acids."""
+""" Monoisotopic mass of all amino acids.
+From https://proteomicsresource.washington.edu/protocols06/masses.php
+"""
 
 WATER_MASS = 18.01528
 """Mass of a water molecule."""
-- 
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