Most abundant protein

MARY E LUCERO malucero at
Sun Jan 21 16:15:21 EST 1996

Scott A Hoffman (schoffma at wrote:

(first paragraph deleted)

: As a side question what is the largest naturally occuring protein?  How 
: big is it?  I have heard that it is a sarcomeric protein, but the name 
: eludes me.  

A news blurb in Science (Vol 270, Dec 22, 1995) states that "Titin" is 
the largest known protein.  This protein has a molecular weight of 3 
million and consists of  a continuous chain of 27,000 amino acids. Each 
molecule stretches 1 micrometer across.   The protein acts to pull muscle 
fiber back into shape after it is stretched. 

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