Update default demo sequences

README_APP.md

@@ -109,14 +109,14 @@ The app has **two tabs**: **Single Prediction** and **Batch Predictions**
 
 ### Example Sequences
 
-**miRNA (miR-21):**
+**miRNA example:**
 ```
 UAGCUUAUCAGACUGAUGUUGA
 ```
 
-**mRNA Target:**
+**mRNA target example (with an embedded complementary site for clearer explainability):**
 ```
-ACGUACGUACGUACGUACGUACGUACGUACGUACGUACGUACGUACGU
+GGGCACUUUUUCAACAUCAGUCUGAUAAGCUAAGUGUCUUCCAGGGAAUU
 ```
 
 ## Model Information

app.py

@@ -54,6 +54,8 @@ BATCH_SHAP_CACHE = {}
 
 MODEL_FILENAME = "pairwise_onehot_model_20260105_200141.pt"
 MODEL_REPO_ID = os.getenv("MIRBIND2_MODEL_REPO", "dimostzim/mirbind2-weights")
+DEFAULT_MIRNA_SEQUENCE = "UAGCUUAUCAGACUGAUGUUGA"
+DEFAULT_TARGET_SEQUENCE = "GGGCACUUUUUCAACAUCAGUCUGAUAAGCUAAGUGUCUUCCAGGGAAUU"
 
 
 def resolve_model_path():
@@ -926,16 +928,17 @@ def create_gradio_interface():
 
                         mirna_input = gr.Textbox(
                             label="miRNA Sequence",
-                            placeholder="Enter miRNA sequence (e.g., UAGCUUAUCAGACUGAUGUUGA)",
+                            placeholder=f"Enter miRNA sequence (e.g., {DEFAULT_MIRNA_SEQUENCE})",
                             lines=3,
-                            value="UAGCUUAUCAGACUGAUGUUGA"  # Example miR-21 sequence
+                            value=DEFAULT_MIRNA_SEQUENCE
                         )
 
                         target_input = gr.Textbox(
                             label="mRNA/Target Sequence",
                             placeholder="Enter mRNA target sequence",
                             lines=5,
-                            value="ACGUACGUACGUACGUACGUACGUACGUACGUACGUACGUACGUACGU"  # Example sequence
+                            # Demo target embeds a reverse-complement site for clearer default explainability.
+                            value=DEFAULT_TARGET_SEQUENCE
                         )
 
                         show_shap = gr.Checkbox(