Titin（肌联蛋白）是目前已知的最大的蛋白质，它的分子量为2700kDa（25，000多个氨基端），长度为1μm，约占肌节的一半，是高度弹性分子。根据IUPAC（国际理论和应用化学联合会）命名规则，该肌联蛋白的名字足足有189819个字母，是名副其实最大的单词……

一个坐在那啥事都不干快速读完也要读3个多少时，别以为没有这样的“傻子”，此前就有人花三个多小时读完了。不禁感慨这哥们不是一般的有耐性哇！

如果考试要考这个单词，这可叫人怎么背呢？下面就是世界上最长的英语单词的一部分。

Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalan

ylglutaminylleucyllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolylp

henylalanylvalylthreonylleucylglycylaspartylprolylglycylisoleucylglutamylglutaminylser

ylleucyllysylisoleucylaspartylthreonylleucylisoleucylglutamylalanylglycylalanylaspartyl

alanylleucylglutamylleucylglycylisoleucylprolylphenylalanylserylaspartylprolylleucylala

nylaspartylglycylprolylthreonylisoleucylglutaminylasparaginylalanylthreonylleucylargi

nylalanylphenylalanylalanylalanylglycylvalylthreonylprolylalanylglutaminylcysteinylph

enylalanylglutamylmethionylleucylalanylleucylisoleucylarginylglutaminyllysylhistidylpr

olylthreonylisoleucylprolylisoleucylglycylleucylleucylmethionyltyrosylalanylasparaginy

lleucylvalylphenylalanylasparaginyllysylglycylisoleucylaspartylglutamylphenylalanyltyr

osylalanylglutaminylcysteinylglutamyllysylvalylglycylvalylaspartylserylvalylleucylvalyla

lanylaspartylvalylprolylvalylglutaminylglutamylserylalanylprolylphenylalanylarginylglut

aminylalanylalanylleucylarginylhistidylasparaginylvalylalanylprolylisoleucylphenylalan

ylisoleucylcysteinylprolylprolylaspartylalanylaspartylaspartylaspartylleucylleucylargin

ylglutaminylisoleucylalanylseryltyrosylglycylarginylglycyltyrosylthreonyltyrosylleucylle

ucylserylarginylalanylglycylvalylthreonylglycylalanylglutamylasparaginylarginylalanyla

lanylleucylprolylleucylasparaginylhistidylleucylvalylalanyllysylleucyllysylglutamyltyrosy

lasparaginylalanylalanylprolylprolylleucylglutaminylglycylphenylalanylglycylisoleucyls

erylalanylprolylaspartylglutaminylvalyllysylalanylalanylisoleucylaspartylalanylglycylala

nylalanylglycylalanylisoleucylserylglycylserylalanylisoleucylvalyllysylisoleucylisoleucyl

glutamylglutaminylhistidylasparaginylisoleucylglutamylprolylglutamyllysylmethionylleu

cylalanylalanylleucyllysylvalylphenylalanylvalylglutaminylprolylmethionyllysylalanylala

nylthreonylarginylacetylseryltyrosylserylisoleucylthreonylserylprolylserylglutaminylph

enylalanylvalylphenylalanylleucylserylserylvalyltryptophylalanylaspartylprolylisoleucyl

glutamylleucylleucylasparaginylvalylcysteinylthreonylserylserylleucylglycylasparaginy

lglutaminylphenylalanylglutaminylthreonylglutaminylglutaminylalanylarginylthreonylthr

eonylglutaminylvalylglutaminylglutaminylphenylalanylserylglutaminylvalyltryptophyllys

ylprolylphenylalanylprolylglutaminylserylthreonylvalylarginylphenylalanylprolylglycyla

spartylvalyltyrosyllysylvalyltyrosylarginyltyrosylasparaginylalanylvalylleucylaspartylpr

olylleucylisoleucylthreonylalanylleucylleucylglycylthreonylphenylalanylaspartylthreon

ylarginylasparaginylarginylisoleucylisoleucylglutamylvalylglutamylasparaginylglutamin

ylglutaminylserylprolylthreonylthreonylalanylglutamylthreonylleucylaspartylalanylthre

onylarginylarginylvalylaspartylaspartylalanylthreonylvalylalanylisoleucylarginylserylal

anylasparaginylisoleucylasparaginylleucylvalylasparaginylglutamylleucylvalylarginylg

lycylthreonylglycylleucyltyrosylasparaginylglutaminyl……此处省略N万字