最多字母的英语单词是哪个?

1913个字母,“色氨酸合成酶a蛋白质”(一种含有267种氨基酸酶)的化学名：methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanyl-glutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalyl-prolyphenylalanylvalythreonylleucylglycylaspartylprolylglycylisoleucyl-glutamylglutaminylserylleucyllysylisoleucylaspartylthreonylleucylisoleucyl-glutamylalanylglycylalanylasparthlalanylleucylglutamylleucylglycylisoleucylprolyl-phenylalanylserylaspartylprolylleucylalanylaspartylglycylprolylthreonylisoleucyl-glutaminylaspfraginylalanylthreonylleucylarfinylalanylphenylalanylalanylalanyl-glycylvalythreonylprolylalanylglutaminylcysteinylphenylalanylglutamylmethionylleu-cylalanylleuoylisoleucylarginylglutaminyllysyhistidylprolylthreonylisoleucylprolyli-soleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalylphenylalany-lasparaginyllysyglycylisoleucylaspartylglutamylphenylalanylthrosylalanyl-glutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylval-ylalnylaspartylvalylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginyl-glutaminylalanylalanylleucylarginylhistidylasparaginyvalylalanylprolylisoleucyl-prolylisoleucylphenylalanylisoleucylphenylalanylisoleucylcysteinylprolylproly-laspartylalanylaspartylaspartylaspartylleucylleucylarginylglutaminylisoleucy-lalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylleucylsery-larginylalanylglycylvalylthreonylglycylalanylglutamylasparainylarginylalanylalanylleucyl-prolylleucylasparaginylhistidylleucylvalylalanyllysylleucyllysylglutamyltyrosylasparaginy-lalanylalanylprolylprolylleucylglutaminylglgycylphenylalanylglycylisoleucylserylalanylproly-laspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylgly-cylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoieucylisoleucylglutamyl-glutaminylhistidylasparaginylisoleucylglutamylprolylglutamyllysylmethionylleucylalaalanylleucyllysylvalylphenylalanylcalylglutaminylprolylmethionlysylalanylalanylthreony-larginylserine