diff --git a/modelling/pymod/_afdb_modelling.py b/modelling/pymod/_afdb_modelling.py
index a273d8d80276aed9aaa3cd793831d3b1cc718b15..ffecf687d33b519399d4b7fd37838c3beb2b5b9f 100644
--- a/modelling/pymod/_afdb_modelling.py
+++ b/modelling/pymod/_afdb_modelling.py
@@ -226,6 +226,27 @@ class FSStructureServer:
         omf_data = self.data[chunk][pos:pos+length]
         return io.OMF.FromBytes(gzip.decompress(omf_data))
 
+    def GetOMFByPLC(self, pos, length, chunk):
+        """ Get stored OMF data structure
+
+        Get data by explicitely specifying PLC (pos, length, chunk). For expert
+        use only, no range checks performed.
+        Instead of providing a uniprot AC or an index, this function takes
+        directly the internal pos, length and chunk parameters that are stored
+        for that particular index. Use case: avoid loading the respective data
+        files and only open the memory mapped files. 
+
+        :param pos: Byte pos in specified chunk
+        :type pos: :class:`int`
+        :param length: Num bytes of entry
+        :type length: :class:`int`
+        :param chunk: Chunk in which entry resides
+        :type chunk: :class:`int` 
+        :returns: OMF data structure of type :class:`ost.io.OMF`
+        """
+        omf_data = self.data[chunk][pos:pos+length]
+        return io.OMF.FromBytes(gzip.decompress(omf_data))
+
     def GetOMF(self, uniprot_ac, fragment="F1", version="v4"):
         """ Get stored OMF data structure