Po citoj ato që tha SmoKer`
The word with the most letters is a name of protein, as a name, it technically does not qualify as a word, but at 1913 characters, we just had to include it. Theoretically these names can contain an infinite amount of characters, but this one qualifies as it has actually been used in a medical journal.
methionylglutaminylarginyltyrosylglutamylserylleuc
yl phenylalanylalanylglutaminylleucyllysylglutamylarg
inyl lysylglutamylglycylalanylphenylalanylvalylprolylph
enyl alanylvalylthreonylleucylglycylaspartylprolylglycy
lisol eucylglutamylglutaminylserylleucyllysylisoleucylas
partyl threonylleucylisoleucylglutamylalanylglycylalanyla
spartyl alanylleucylglutamylleucylglycylisoleucylprolylphe
nyl alanylserylaspartylprolylleucylalanylaspartylglycy
lprolyl threonylisoleucylglutaminylasparaginylalanylthreon
ylleucyl arginylalanylphenylalanylalanylalanylglycylvalylth
reonyl prolylalanylglutaminylcysteinylphenylalanylglutamy
l methionylleucylalanylleucylisoleucylarginylglutami
nyllysyl histidylprolylthreonylisoleucylprolylisoleucylglyc
ylleucyl leucylmethionyltyrosylalanylasparaginylleucylvalyl
phenyl alanylasparaginyllysylglycylisoleucylaspartylgluta
mylphenyl alanyltyrosylalanylglutaminylcysteinylglutamyllysy
lvalyl glycylvalylaspartylserylvalylleucylvalylalanylaspa
rtylvalyl prolylvalylglutaminylglutamylserylalanylprolylphen
ylalanyl arginylglutaminylalanylalanylleucylarginylhistidyl
asparaginyl valylalanylprolylisoleucylphenylalanylisoleucylcys
teinyl prolylprolylaspartylalanylaspartylaspartylaspartyl
leucyl leucylarginylglutaminylisoleucylalanylseryltyrosyl
glycyl arginylglycyltyrosylthreonyltyrosylleucylleucylser
ylarginyl alanylglycylvalylthreonylglycylalanylglutamylaspar
aginyl arginylalanylalanylleucylprolylleucylasparaginylhi
stidyl leucylvalylalanyllysylleucyllysylglutamyltyrosylas
paraginyl alanylalanylprolylprolylleucylglutaminylglycylphen
ylalanyl glycylisoleucylserylalanylprolylaspartylglutaminyl
valyllysyl alanylalanylisoleucylaspartylalanylglycylalanylala
nylglycyl alanylisoleucylserylglycylserylalanylisoleucylvaly
llysylisol eucylisoleucylglutamylglutaminylhistidylasparaginy
lisoleucyl glutamylprolylglutamyllysylmethionylleucylalanylal
anylleucyl lysylvalylphenylalanylvalylglutaminylprolylmethion
yllysyl alanylalanylthreonylarginylserine
