最长的英文单词由4197个字母组成。它是一个化学名词，为一含有500个氨基酸的化学物质。Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleucyll
ysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolyphenylalanYlvalythreo
nylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylsErylleucyllysylisoleucylasp
artylthreonylleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamylleucylgl
ycylisoleucylprolylphenylalanylseRylaspartylprolylleucylalanylaspartylglycylpRolylthreOn
ylisoleucylglutaminylasPfraginylalanylthreonylleucylarfinylalanylphenylalanylalanylalanyl
glycylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylala
nylleuOylisoleucylarginylglutaminyllysyhistidylprolylthreonylisoleucylprolylisoleucylglycy
lleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalanylasparaginyllysyglycylisole
ucylaspartylglutamylphenylalanylthrosylalanylglutaminylcysteinylglutamyllysylvalylglycyl
valylaspartylserylvalylleucylvalylalnylaspartylvalylprolylvalylglUtaminylglutamylserylalan
ylprolylphenylalanylarginylglutaminylalanylalanylleucylarginylhistidylasparaginyvalylalany
lprolylisoleucylprolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylpro
lylaspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylserylt
yrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylarginylalanylglycylvalylth
reonylglycylalanylglutamYlasparainylarginylalanylalanylleucylprolylleucylasparaginylhisti
dylleucylValylalanyllysylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleuc
ylglutaminylglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylvalyllys
ylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylsery
lalanylisoleucylvalyllysylisoIeucylisoleucylglutamylglutaminylHistidylasparaginyliSoleucyl
glutamylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylgl
utaminylprolylmethionlysylalanylalanylthreonylarginylserineMethionylglutaminylarginylty
rosylglutamylserylleucylphenylalanylalanylglutaminylleucyllysylglutamylarginyllysyglutam
ylgycylalanylphenylalanylvalylprolylphenylalanylvalylthreonylleucylglycylaspartylprolylgl
ycyllisoleucylglutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucylisoleucylgl
utamylalanylglycylalanylaspartylalanylleucylglutamylleucylglycylisoleucylprolylphenylala
nylserylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucylglutaminylasparagi
nylalanylthreonylleucylarginylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalan
ylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglut
aminyllysylhistidylprolylthreonylisoleucylprolylisoleucylglycylleucylleucylmethionyltyrosy
lalanylasparaginylleucylvalylphenylalanylasparaginyllysylglycylisoleucylaspartylglutamylp
henylalanyltyrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylsrylvalyll
eucylvalylalanylaspartylvalylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylar
ginylglutaminylalanylalanylleucylarginylhistidylasparaginylvalylalanylprolylisoleucylpheny
lalanylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucylargin
ylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylleuc
ylserylarginylalanylglycylvalylthreonylglycylalanylglutamylasparaginylarginylalanylalanyll
eucylleucyllysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminylglycylp
henylalanylglysylisoleucylserylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucy
laspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalylly
sylisoleucylisoleucylglutamylglutaminylhistidylasparaginylisoleucylglutamylprolylglutamyll
ysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylvalylglutaminylprolylmethion
yllysylalanylalanylthreonylarginyglutamyltyrosylasparaginylalanylalanylprolylprolylleucylg
lutaminylglycylphenylalanylglysylisoleucylserylalanylprolylaspartylglutaminylvalyllysylala
nylalanylisoleucylaspartylalanylglycylalanylalanylglycylalanylisoleucylserylglycylserylalan
ylisoleucylvalyllysylisoleucylisoleucylglutamylglutaminylhistidylasparaginylisoleucylgluta
mylprolylglutamyllysylmethionylleucylalanylalanylleucyllysylvalylphenylalanylvalylgl