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  Topic: Hemoglobin IC?< Next Oldest | Next Newest >  
Tom Ames

Posts: 238
Joined: Dec. 2002

(Permalink) Posted: Jan. 23 2003,11:58   

Has anyone seen claims made for the IC-ity of Hemoglobin? Seems like a natural: tetrameric structure, cooperative binding of oxygen, looks designed to change loading capacity in just the right way to deliver oxygen from lungs to tissues.

-Tom Ames

charlie d

Posts: 56
Joined: Oct. 2002

(Permalink) Posted: Jan. 23 2003,12:56   

IIRC, Behe said that the case for hemoglobin IC-ness was not very strong, without really justifying why.  The main reason, I suspect, is that at the time of DBB there was already good evidence to show how hemoglobin could have evolved.  

If Behe had said hemoglobin was IC, he would have had to admit IC can evolve; if he had said it wasn't, he would have had to throw out the "loss of function"-based definition of IC.  Basically rather than acknowledge the problem with the IC concept and/or its definition(s), he took the fifth.

Edited by charlie d on Jan. 23 2003,12:57

  1 replies since Jan. 23 2003,11:58 < Next Oldest | Next Newest >  


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