What is the grammatical force of ek in Ephesians 5:30b?

This text is disputed. The question is only about the Textus Receptus Greek text, as below. οτι μελη εσμεν του σωματος αυτου εκ της σαρκος αυτου και εκ των οστεων αυτου [Ephesians 5:30 TR – Beza, Stephanus, Elzevir and Scrivener are all …