diff --git a/README.md b/README.md
index ee85df9..90c6435 100644
--- a/README.md
+++ b/README.md
@@ -122,68 +122,68 @@
    
    Contains CPPs with natural or modified amino acids.
 
-      1.1. POSEIDON
-   
-      Contains heterogeneous experimental data regarding CPP (natural and non-natural amino acids) activity measurements (.csv format), which are:
-      - peptide name,
-      - target cell line CPP was tested on cell penetration ability,
-      - delivered molecule/protein,
-      - paper PubMed ID,
-      - cellular uptake measurement + measurement units,
-      - CPP+cargo concentration,
-      - incubation time,
-      - incubation temperature,
-      - determination method,
-      - uptake type,
-      - sequence.
+   1.1. POSEIDON
+   
+   Contains heterogeneous experimental data regarding CPP (natural and non-natural amino acids) activity measurements (.csv format), which are:
+   - peptide name,
+   - target cell line CPP was tested on cell penetration ability,
+   - delivered molecule/protein,
+   - paper PubMed ID,
+   - cellular uptake measurement + measurement units,
+   - CPP+cargo concentration,
+   - incubation time,
+   - incubation temperature,
+   - determination method,
+   - uptake type,
+   - sequence.
 
 ### 2. Natural CPPs
    
    Contains only sequences with natural amino acids.
 
-       2.1. CPPBase
-      
-       Contains sequences of CPPs with experimentally proved activity in .fasta format.
+   2.1. CPPBase
+  
+   Contains sequences of CPPs with experimentally proved activity in .fasta format.
 
-   
-       2.2. Experimental and Experimental2
-      
-       Contain more sequences of CPPs with experimentally proved activity in .txt format.
 
-   
-       2.3. Experimental_high_uptake
-      
-       Contains CPP sequences with high (but not stated) uptake in .txt format.
+   2.2. Experimental and Experimental2
+  
+   Contain more sequences of CPPs with experimentally proved activity in .txt format.
 
-       2.4. Balanced_dataset
-       
-       Represents a balanced dataset of CPPs and non-CPPs; often used for model benchmarking.
+
+   2.3. Experimental_high_uptake
+  
+   Contains CPP sequences with high (but not stated) uptake in .txt format.
+
+   2.4. Balanced_dataset
+   
+   Represents a balanced dataset of CPPs and non-CPPs; often used for model benchmarking.
 
 ### 3. Non-CPPs
    
    Contains negative CPP samples in .txt format.
 
-       3.1. Generated
-      
-       Contains randomly generated sequences treated as negative.
+   3.1. Generated
+  
+   Contains randomly generated sequences treated as negative.
 
-   
-       3.2. Experimental
-      
-       Contains non-CPP sequences shown not to demonstrate activity experimentally.
+
+   3.2. Experimental
+  
+   Contains non-CPP sequences shown not to demonstrate activity experimentally.
 
 ### 4. Non-Natural CPPs
    
    Contains CPPs consisting of non-natural amino acids.
 
-       4.1. CPPBase_modified
-      
-       Contains a list of modified CPPs with experimentally proved activity in .fasta format.
+   4.1. CPPBase_modified
+  
+   Contains a list of modified CPPs with experimentally proved activity in .fasta format.
 
-      
-       4.2. CPPBase_modified_symbols
-      
-       Contains a list of abbreviations for modified amino acids  in .txt format (ABBREVIATION: NAME; ...: ...).
+  
+   4.2. CPPBase_modified_symbols
+  
+   Contains a list of abbreviations for modified amino acids  in .txt format (ABBREVIATION: NAME; ...: ...).
 
 
 ## Useful tools :bookmark_tabs: