diff --git a/lib/synthesis/fragment/fragment.go b/lib/synthesis/fragment/fragment.go
index a9fbae7..f52bd7c 100644
--- a/lib/synthesis/fragment/fragment.go
+++ b/lib/synthesis/fragment/fragment.go
@@ -293,7 +293,7 @@ func RecursiveFragment(sequence string, maxCodingSizeOligo int, assemblyPattern
 		}
 		var fragmentsAppended []string
 		for _, fragment := range fragments {
-			fragmentsAppended = append(fragmentsAppended, forwardFlank+fragment+reverseFlank)
+			fragmentsAppended = append(fragmentsAppended, fragment)
 		}
 		return Assembly{Sequence: sequence, Fragments: fragmentsAppended, Efficiency: efficiency}, nil
 	}
diff --git a/py/tests/test_fragment.py b/py/tests/test_fragment.py
index 1500e45..43f5b2d 100644
--- a/py/tests/test_fragment.py
+++ b/py/tests/test_fragment.py
@@ -42,4 +42,4 @@ def test_recursive_fragment():
     result = recursive_fragment(gene, max_oligo_len, assembly_pattern, exclude_overhangs, default_overhangs, "GTCTCT", "CGAG")
     assert result is not None, "RecursiveFragment failed"
     # Add more specific assertions based on the expected structure of the result
-    assert result.fragments == ['GTCTCTGTCTCTATGACCATGATTACGCCAAGCTTGCATGCCTGCAGGTCGACTCTAGAGGATCCCCGGGTACCGAGCTCGAATTCACTGGCCGTCGTTTTACAACGTCGTGACTGGGAAAACCCTGGCGTTACCCAACTTAATCGCCTTGCAGCACATCCCCCTTTCGCCAGCGAG', 'GTCTCTCCAGCTGGCGTAATAGCGAAGAGGCCCGCACCGATCGCCCTTCCCAACAGTTGCGCAGCCTGAATGGCGAATGGCGCCTGATGCGGTATTTTCTCCTTACGCATCTGTGCGGTATTTCACACCGCATATGGTGCACTCTCAGTACAATCTGCTCTGATGCCGCATAGCGAGCGAG']
+    assert result.fragments == ['GTCTCTATGACCATGATTACGCCAAGCTTGCATGCCTGCAGGTCGACTCTAGAGGATCCCCGGGTACCGAGCTCGAATTCACTGGCCGTCGTTTTACAACGTCGTGACTGGGAAAACCCTGGCGTTACCCAACTTAATCGCCTTGCAGCACATCCCCCTTTCGCCAGCGAG', 'CCAGCTGGCGTAATAGCGAAGAGGCCCGCACCGATCGCCCTTCCCAACAGTTGCGCAGCCTGAATGGCGAATGGCGCCTGATGCGGTATTTTCTCCTTACGCATCTGTGCGGTATTTCACACCGCATATGGTGCACTCTCAGTACAATCTGCTCTGATGCCGCATAGCGAG']