目前最长的一个英语单词是什么？

Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalany
lglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenyla
lanylvalylprolyphe

Methionylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalany

lglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenyla

lanylvalylprolyphenylalanYlvalythreonylleucylglycylaspartylprolylglyc

ylisoleucylglutamylglutaminylsErylleucyllysylisoleucylaspartylthreony

lleucylIsoleucylglutamylalanylglycylalanylasparthlalanylleucylglutamy

lleucylglycylisoleucylprolylphenylalanylseRylaspartylprolylleucylalan

ylaspartylglycylpRolylthreOnylisoleucylglutaminylasPfraginylalanylthr

eonylleucylarfinylalanylphenylalanylalanylalanylglycylvalythreonylpro

lylalanylglutaminylcysteinylphenylalanylglutamylmethionylleucylalanyl

leuOylisoleucylarginylglutaminyllysyhistidylprolylthreonylisoleucylpr

olylisoleucylglycylleucylmethionyltyrosylalanylasparaginylleucylvalyl

phenylalanylasparaginyllysyglycylisoleucylaspartylglutamylphenylalany

lthrosylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylasparty

lserylvalylleucylvalylalnylaspartylvalylprolylvalylglUtaminylglutamyl

serylalanylprolylphenylalanylarginylglutaminylalanylalanylleucylarginy

lhistidylasparaginyvalylalanylprolylisoleucylprolylisoleucylphenylalan

ylisoleucylphenylalanylisoleucylcysteinylprolylprolylaspartylalanylasp

artylaspartylaspartylleucylleucylarginylglutaminylisoleucylalanylseryl

tyrosylglycylarginylglycyltyrosylthreonyltyrOsylleucylleucylserylargin

ylalanylglycylvalylthreonylglycylalanylglutamYlasparainylarginylalanyl

alanylleucylprolylleucylasparaginylhistidylleucylValylalanyllysylleucy

llysylglutamyltyrosylasparaginylalanylalanylprolylprolylleucylglutaminy

lglgycylphenylalanylglycylisoleucylserylalanylprolylaspartylglutaminylv

alyllysylalanylalanylisoleucylaspartylalanylglycylalanylalanylglycylala

nylisoleucylserylglycylserylalanylisoleucylvalyllysylisoIeucylisoleucyl

glutamylglutaminylHistidylasparaginyliSoleucylglutamylprolylglutamyllys

ylmethionylleucylalanylalanylleucyllysylvalylphenylalanylcalylglutaminy

lprolylmethionlysylalanylalanylthreonylarginylserine

色氨酸合成酶A蛋白质