we now report that calmodulin is bound with high affinity to granule membrane proteins of molecular weights ( mrs ) 25,000 and 22,000 ( 25k and 22k ) at low ca2+ ( less than 10 ( -8 ) m ) and to proteins with mrs 69k and 50k at high ca2+ ( greater than 1 microm ) .
C0025252
membrane proteins
C0033684
proteins