diff --git a/docs/enzymes.rst b/docs/enzymes.rst
index 16f26f247594638f3dd2658221ef72a942abbc3e..343d6f4581cd1cae25457dd3340a3e571f0d4b13 100644
--- a/docs/enzymes.rst
+++ b/docs/enzymes.rst
@@ -39,6 +39,7 @@ Available enzymes
 37: :ref:`staphI`   38: :ref:`therm`    39: :ref:`throm`
 40: :ref:`thromsg`  41: :ref:`tev`      42: :ref:`tryps`
 43: :ref:`asp-n2`   44: :ref:`proa`     45: :ref:`elast`
+46: :ref:`alp`
 ==================  ==================  ==================
 
 .. _arg-c:
@@ -915,3 +916,20 @@ cleaving rule:
 * ``(A or V or S or G or L or or I,)``
 
 More information: https://france.promega.com/products/mass-spectrometry/proteases-and-surfactants/elastase/?catNum=V1891
+
+
+
+.. _alp:
+
+aLP
+...
+
+α-Lytic Protease preferentially cleaves after T, A, S or V (`P1`)
+
+**RPG definition:**
+
+cleaving rule:
+
+* ``(T or A or S or V,)``
+
+More information: https://www.neb.com/en/products/p8113-a-lytic-protease#Product%20Information