Fetch entries with specific pattern

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http://www.unix.com – Hi all, I have following sample input file which is a part of big file: Code: ID  AINX_HUMAN              Reviewed;        499 AA. AC  Q16352; B1AQK0; Q9BRC5; DT  30-MAY-2000, integrated into UniProtKB/Swiss-Prot. DT  23-JAN-2002, sequence version 2. DT  28-NOV-2012, entry version 123. DE  RecName: Full=Alpha-internexin; DE            Short=Alpha-Inx; DE  AltName: Full=66 kDa neurofilament protein; DE            Short=N (HowTos)