extract data from a text file in a loop

My text file contains coordinates of a molecule. The coordinates represents the frames of molecule. Every frame of molecule ends with 'TER' line in a file. I would like to extract all lines till 'TER' as a single element of array and keep continue extracting frames. It will stop at line with 'END' word.

[Walter Roberson]

Could you give a brief extract?

[MHN]

Once I have written the similar code. Please attach your text file in your question (for example with 3 entries) and I will change that code in the way that works for you.