diff --git a/src/main.rs b/src/main.rs
index d7b3f27710ae27aa4ed8070b46d9f7c1ed3e91fa..8c883c23b972261632939aeec86848df05e8118f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -8,7 +8,7 @@ fn main() {
     println!("Prot : {} \nn chain: {}\nn res: {}\nn atom: {}", my_prot.name, my_prot.get_number_chain(), my_prot.get_number_residue(), my_prot.get_number_atom());
     println!("Reduce protein");
 
-    let chainA = my_prot.select_atoms("chain a").unwrap();
-    println!("Prot : {} \nn chain: {}\nn res: {}\nn atom: {}", chainA.name, chainA.get_number_chain(), chainA.get_number_residue(), chainA.get_number_atom());
+    let chain_a = my_prot.select_atoms("chain a").unwrap();
+    println!("Prot : {} \nn chain: {}\nn res: {}\nn atom: {}", chain_a.name, chain_a.get_number_chain(), chainA.get_number_residue(), chainA.get_number_atom());
 
 }
diff --git a/src/pdb/atom.rs b/src/pdb/atom.rs
index 130d0d2c9e7a097aadb5fe1bb153836eb3d7394d..c854bccf59c56fb80d921ed85f50e0cdaad930b5 100644
--- a/src/pdb/atom.rs
+++ b/src/pdb/atom.rs
@@ -17,6 +17,7 @@ pub struct Atom {
 
 impl Atom {
     /// Create a new structure Atom. An atom have a name, a number and x, y, z coordinates
+    /// If the atom name is "C", "CA", "N", "O", "OT1" or "OT2", it will be consider as backbone
     ///
     /// # Examples
     /// 
@@ -28,11 +29,7 @@ impl Atom {
     /// ````   
     pub fn new(name: String, number: u64, coord: [f32; 3]) -> Atom {
         let n = name.deref();
-        let back = if n == "C" ||  n == "CA" || n == "N" || n == "O" || n == "OT1" || n == "OT2" {
-            true
-        } else {
-            false
-        };
+        let back = n == "C" ||  n == "CA" || n == "N" || n == "O" || n == "OT1" || n == "OT2";
         Atom {
             name,
             number,
@@ -41,6 +38,12 @@ impl Atom {
         }
     }
 
+    /// Get the name of the atom
+    /// 
+    pub fn name(self) -> String{
+        self.name.clone()
+    }
+
     /// Compute the distance between 2 Atoms
     ///
     /// # Examples
diff --git a/src/pdb/protein.rs b/src/pdb/protein.rs
index c0cd079e7ff462439382c5f6e8ec7fd943339a14..e565506d5a7c6408600f40cfe9f8a68cc4bdc922 100644
--- a/src/pdb/protein.rs
+++ b/src/pdb/protein.rs
@@ -286,7 +286,7 @@ impl<'a> Protein {
     // ex: don't parse the chain if it's not selected
     pub fn select_atoms(&self, pattern: &str) -> Option<Protein> {
 
-        let mut n_prot = Protein::new(String::from(self.name.clone()));
+        let mut n_prot = Protein::new(self.name.clone());
 
         let select = match selection_atom::parse_select(&pattern) {
             Some(x) => x,
diff --git a/src/pdb/read_pdb.rs b/src/pdb/read_pdb.rs
index 49a2b3c7e8e4f0eab1a2cfc7c546fb91838e62ac..69c18e3aef57a6bbbe6324d9ac5ab9f3c3980c18 100644
--- a/src/pdb/read_pdb.rs
+++ b/src/pdb/read_pdb.rs
@@ -12,7 +12,7 @@ use super::protein::Protein;
 /// # Errors
 /// Will return 0.0 if the String cannot be convert and print the error
 ///
-fn parse_float(s: &String) -> f32 {
+fn parse_float(s: &str) -> f32 {
     match s.trim().parse::<f32>() {
         Ok(n) => n,
         Err(e) => {
@@ -30,15 +30,15 @@ fn parse_float(s: &String) -> f32 {
 /// # Errors  
 /// Will return 0 if the String cannot be convert and print the error
 ///
-fn parse_int(s: &String) -> i64 {
+fn parse_int(s: &str) -> i64 {
     match s.trim().parse::<i64>() {
         Ok(n) => n,
         Err(e) => {
             match i64::from_str_radix(s.trim(), 16) {
-                Ok(n) => return n,
+                Ok(n) => n,
                 Err(_) => {
                     println!("{}", e);
-                    return 0
+                    0
                 }
             }
         }
@@ -79,7 +79,7 @@ pub fn parse_pdb(pdb: &str, name: &str) -> Protein {
         let l = line.unwrap();
         if l.starts_with("HETAM") || l.starts_with("ATOM") {
             let atom_name = &l[12..17].trim().to_string();
-            let residue_name = &l[17..20].trim().to_string();
+            let residue_name = &l[17..20].trim();
             let chain = l[21..22].chars().next().unwrap();
             let atom_number = parse_int(&l[6..11].to_string());
             let residue_number = parse_int(&l[22..26].to_string());
@@ -87,14 +87,15 @@ pub fn parse_pdb(pdb: &str, name: &str) -> Protein {
             let y = parse_float(&l[38..46].to_string());
             let z = parse_float(&l[46..54].to_string());
             if is_protein_res(residue_name, &lst_res) {
-                protein.update_protein(chain, residue_name.clone(), residue_number as u64, atom_name.clone(), atom_number as u64, [x, y, z]);
+                protein.update_protein(chain, residue_name.to_string(), residue_number as u64, atom_name.clone(), atom_number as u64, [x, y, z]);
             }
         }
     }
     protein
 }
-
-fn is_protein_res(r: &str, lst: &Vec<&str>) -> bool {
+/// Test if the selected line is a residue
+/// 
+fn is_protein_res(r: &str, lst: &[&str]) -> bool {
 
     let r = r.to_uppercase();
 
diff --git a/src/pdb/residue.rs b/src/pdb/residue.rs
index de85d05ab8235a536d5bac36eae3e9f0f5ad30c2..08c151f498379481ca9d679a4486f65f71a0d7c5 100644
--- a/src/pdb/residue.rs
+++ b/src/pdb/residue.rs
@@ -34,7 +34,14 @@ impl Residue {
         }
     }
 
+    /// Get the name of the residue
+    /// 
+    pub fn name(&self) -> String {
+        self.name.clone()
+    }
+
     /// Get the number of the residue
+    /// 
     pub fn get_res_num(&self) -> u64 {
         self.res_num
     }
diff --git a/tests/test.rs b/tests/test.rs
index de6b5b54d4bd5cf6395817760b1be6d427c3b07a..cab684998aeaece6d7fe4aafca1d78d8c6206f2a 100644
--- a/tests/test.rs
+++ b/tests/test.rs
@@ -2,8 +2,8 @@ extern crate pdbparser;
 
 #[test]
 fn parse_f2() {
-    use pdbparser;
     let my_prot = pdbparser::parse_pdb("tests/tests_file/f2.pdb", "f2");
+    assert_eq!("f2", my_prot.name());
     assert_eq!(1, my_prot.get_number_chain());
     assert_eq!(66, my_prot.get_number_residue());
     assert_eq!(1085, my_prot.get_number_atom());
@@ -11,7 +11,6 @@ fn parse_f2() {
 
 #[test]
 fn parse_f2_adn() {
-    use pdbparser;
     let my_prot = pdbparser::parse_pdb("tests/tests_file/f2_adn.pdb", "f2");
     assert_eq!(1, my_prot.get_number_chain());
     assert_eq!(66, my_prot.get_number_residue());
@@ -20,7 +19,6 @@ fn parse_f2_adn() {
 
 #[test]
 fn parse_trp() {
-    use pdbparser;
     let my_prot = pdbparser::parse_pdb("tests/tests_file/trp_MD.pdb", "trp");
     assert_eq!(1, my_prot.get_number_chain());
     assert_eq!(704, my_prot.get_number_residue());
@@ -29,9 +27,23 @@ fn parse_trp() {
 
 #[test]
 fn parse_5jpq() {
-    use pdbparser;
     let my_prot = pdbparser::parse_pdb("tests/tests_file/5jpq.pdb", "5jpq");
     assert_eq!(35, my_prot.get_number_chain());
     assert_eq!(8173, my_prot.get_number_residue());
     assert_eq!(44801, my_prot.get_number_atom());
+}
+
+#[test]
+fn f2_res() {
+    let mut my_prot = pdbparser::parse_pdb("tests/tests_file/f2.pdb", "f2");
+    let chain_a = my_prot.get_chain_ref('A').unwrap();
+
+    let res = chain_A.get_residue_ref(1).unwrap();
+    assert_eq!("THR", res.name());
+
+    let res = chain_A.get_residue_ref(2).unwrap();
+    assert_eq!("SER", res.name());
+
+    let res = chain_A.get_residue_ref(chain_A.get_number_residue()).unwrap();
+    assert_eq!("HSD", res.name());
 }
\ No newline at end of file