text: The coalescent named by this letter is an instance of lambda coalescents and a generalization of Kingman's.  
full_question: The coalescent named by this letter is an instance of lambda coalescents and a generalization of Kingman's.  The substrate in a process partly named for this letter is carried to its destination by a carnitine shuttle. A protein family partly named for this letter provides hardness to the scales, shells, and skin of reptiles. The most common type of carotene in plants is named for this letter. A “sheet” named for this letter is a regular secondary structure in proteins. Fatty acids are broken down by an oxidation named after, for 10 points, what Greek letter that can refer to the second carbon to attach to a molecule, after the alpha carbon?
first_sentence: The coalescent named by this letter is an instance of lambda coalescents and a generalization of Kingman's.  