Python 2 Merge Data Frames into one Table

I'm working with this loop:

for elem in dfList:
   flatlist=[]
   for item in elem:
      flatlist.append(item)
      df = pd.DataFrame([flatlist], columns = ['Target', 'Position', 'Residue', 'Kinase'])
      print(type(df))

And retrieving:

<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>
<class 'pandas.core.frame.DataFrame'>

How can I merge all the frames into one single table without using the package dplyr. I'm with Python 2.7.

Thanks in advance!