From 66e3e552c970bd746b14920dc3949c5bf1b329b0 Mon Sep 17 00:00:00 2001
From: Nathan Baker <nathanandrewbaker@gmail.com>
Date: Sat, 23 May 2020 09:20:49 -0700
Subject: [PATCH] Add description of hybrid36.

Addresses https://github.com/jensengroup/propka-3.1/pull/33#discussion_r429108127
---
 propka/atom.py     | 1 -
 propka/hybrid36.py | 4 ++++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/propka/atom.py b/propka/atom.py
index 5db56e3..cd399b1 100644
--- a/propka/atom.py
+++ b/propka/atom.py
@@ -2,7 +2,6 @@
 import string
 import propka.lib
 import propka.group
-# TODO - what is hybrid36?
 from . import hybrid36
 
 
diff --git a/propka/hybrid36.py b/propka/hybrid36.py
index f5b96af..e0af2dc 100644
--- a/propka/hybrid36.py
+++ b/propka/hybrid36.py
@@ -1,3 +1,7 @@
+"""Provides an alternative PDB format that can transparently encode larger atom numbers.
+
+http://cci.lbl.gov/hybrid_36/
+"""
 import string
 
 _hybrid36_upper_chars = set(string.ascii_uppercase)