From 04ab0235deabe4fc7c796a14a50dc8ace48029b7 Mon Sep 17 00:00:00 2001
From: Patrick Kunzmann <padix.key@gmail.com>
Date: Mon, 9 Sep 2024 08:17:34 +0200
Subject: [PATCH] fixup! Add positional substitution matrices

---
 src/biotite/sequence/seqtypes.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/biotite/sequence/seqtypes.py b/src/biotite/sequence/seqtypes.py
index 3c636f95b..0234776a1 100644
--- a/src/biotite/sequence/seqtypes.py
+++ b/src/biotite/sequence/seqtypes.py
@@ -608,7 +608,9 @@ class PositionalSequence(Sequence):
     """
     A sequence where each symbol is associated with a position.
 
-    Its symbols are
+    For each individual position the sequence contains a separate
+    :class:`PositionalSequence.Symbol`, encoded by a custom alphabet for this sequence.
+    In consequence the symbol code is the position in the sequence itself.
     This is useful for aligning sequences based on a position-specific
     substitution matrix.