def __read_seq_data(fh):
line = None<EOL>seq_data = "<STR_LIT>"<EOL>while line is None or not _isSequenceHead(line):<EOL><INDENT>line = fh.readline()<EOL>if line == "<STR_LIT>":<EOL><INDENT>break  <EOL><DEDENT>if not _isSequenceHead(line):<EOL><INDENT>seq_data += line.strip()<EOL><DEDENT><DEDENT>return seq_data, line<EOL>
:return: a tuple of the sequence data and the last line that was read from
         the file handle/stream