最長的英文字是哪個?

英文中最長的英文字由3,600個字母組成．．．它是一個化學名詞，為一含有500個氨基酸的化學物質。 內容如下：

（Methionylglutaminyla rginyltyrosylglutamy lserylleucylphenylal anylalanylglutaminyl leucyllysylglutamyla rginyllysygluta- mylgycylalanylphenyl alanylvalylprolylphe nylalanylvalylthreon ylleucylglycylaspart ylprolylglycyllisole ucylglutamylgluta- minylserylleucyllysy lisoleucylaspartylth reonylleucylisoleucy lglutamylalanylglycy lalanylaspartylalany lleucylglutamylleu- cylglycylisoleucylpr olylphenylalanylsery laspartylprolylleucy lalanylaspartylglycy lprolylthreonylisole ucylglutaminylaspar- aginylalanylthreonyl leucylarginylalanylp henylalanylalanylala nylglycylvalylthreon ylprolylalanylglutam inylcysteinylphen- ylalanylglutamylmeth ionylleucylalanylleu cylisoleucylarginylg lutaminyllysylhistid ylprolylthreonylisol eucylprolylisoleucy- lglycylleucylleucylm ethionyltyrosylalany lasparaginylleucylva lylphenylalanylaspar aginyllysylglycyliso leucylaspartylgluta- mylphenylalanyltyros ylalanylglutaminylcy steinylglutamyllysyl valylglycylvalylaspa rtylsrylvalylleucylv alylalanylaspartylv- alylprolylvalylgluta minylglutamylserylal anylprolylphenylalan ylarginylglutaminyla lanylalanylleucylarg inylhistidylasparagi - nylvalylalanylprolyl isoleucylphenylalany lisoleucylcysteinylp rolylprolylaspartyla lanylaspartylasparty laspartylleucylleucy la- rginylglutaminylisol eucylalanylseryltyro sylglycylarginylglyc yltyrosylthreonyltyr osylleucylleucylsery larginylalanylglycyl v- alylthreonylglycylal anylglutamylasparagi nylarginylalanylalan ylleucylleucyllysylg lutamyltyrosylaspara ginylalanylalanylpr- olylprolylleucylglut aminylglycylphenylal anylglysylisoleucyls erylalanylprolylaspa rtylglutaminylvalyll ysylalanylalanylisol e- ucylaspartylalanylgl ycylalanylalanylglyc ylalanylisoleucylser ylglycylserylalanyli soleucylvalyllysylis oleucylisoleucylglut a- mylglutaminylhistidy lasparaginylisoleucy lglutamylprolylgluta myllysylmethionylleu cylalanylalanylleucy llysylvalylphenyl- alanylvalylglutaminy lprolylmethionyllysy lalanylalanylthreony larginyglutamyltyros ylasparaginylalanyla lanylprolylprolylle- ucylglutaminylglycyl phenylalanylglysylis oleucylserylalanylpr olylaspartylglutamin ylvalyllysylalanylal anylisoleucylasparty - lalanylglycylalanyla lanylglycylalanyliso leucylserylglycylser ylalanylisoleucylval yllysylisoleucylisol eucylglutamylglutami n- ylhistidylasparaginy lisoleucylglutamylpr olylglutamyllysylmet hionylleucylalanylal anylleucyllysylvalyl phenylalanylvalylgl- utaminylprolylmethio nyllysylalanylalanyl threonylarginylserin e

Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysygluta- mylgycylalanylphenylalanylvalylprolylphenylalanylvalylthreonylleucylglycylaspartylprolylglycyllisoleucylglutamylgluta- minylserylleucyllysylisoleucylaspartylthreonylleucylisoleucylglutamylalanylglycylalanylaspartylalanylleucylglutamylleu- cylglycylisoleucylprolylphenylalanylserylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucylglutaminylaspar- aginylalanylthreonylleucylarginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanylglutaminylcysteinylphen- ylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglutaminyllysylhistidylprolylthreonylisoleucylprolylisoleucy- lglycylleucylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysylglycylisoleucylaspartylgluta- mylphenylalanyltyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylsrylvalylleucylvalylalanylaspartylv- alylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparagi- nylvalylalanylprolylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucyla- rginylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylleucylserylarginylalanylglycylv- alylthreonylglycylalanylglutamylasparaginylarginylalanylalanylleucylleucyllysylglutamyltyrosylasparaginylalanylalanylpr- olylprolylleucylglutaminylglycylphenylalanylglysylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisole- ucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucylisoleucylgluta- mylglutaminylhistidylasparaginylisoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenyl- alanylvalylglutaminylprolylmethionyllysylalanylalanylthreonylarginyglutamyltyrosylasparaginylalanylalanylprolylprolylle- ucylglutaminylglycylphenylalanylglysylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylasparty- lalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucylisoleucylglutamylglutamin- ylhistidylasparaginylisoleucylglutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylvalylgl- utaminylprolylmethionyllysylalanylalanylthreonylarginylserine