J´ai trouvé le mot le plus long, enfin je crois...
acetylseryltyrosylserylisoleucylthreonylserylproly
lserylglutaminyl-
phenylalanylvalylphenylalanylleucylserylserylvalyl
tryptophylalanyl-
aspartylprolylisoleucylglutamylleucylleucylasparag
inylvalylcysteinyl-
threonylserylserylleucylglycylasparaginylglutaminy
lphenylalanyl-
glutaminylthreonylglutaminylglutaminylalanylarginy
lthreonylthreonyl-
glutaminylvalylglutaminylglutaminylphenylalanylser
ylglutaminylvalyl-
tryptophyllysylprolylphenylalanylprolylglutaminyls
erylthreonylvalyl-
arginylphenylalanylprolylglycylaspartylvalyltyrosy
llysylvalyltyrosyl-
arginyltyrosylasparaginylalanylvalylleucylaspartyl
prolylleucylisoleucyl-
threonylalanylleucylleucylglycylthreonylphenylalan
ylaspartylthreonyl-
arginylasparaginylarginylisoleucylisoleucylglutamy
lvalylglutamyl-
asparaginylglutaminylglutaminylserylprolylthreonyl
threonylalanylglutamyl-
threonylleucylaspartylalanylthreonylarginylarginyl
valylaspartylaspartyl-
alanylthreonylvalylalanylisoleucylarginylserylalan
ylasparaginylisoleucyl-
asparaginylleucylvalylasparaginylglutamylleucylval
ylarginylglycyl-
threonylglycylleucyltyrosylasparaginylglutaminylas
paraginylthreonyl-
phenylalanylglutamylserylmethionylserylglycylleucy
lvalyltryptophyl-
threonylserylalanylprolylalanylserine