the method of continuous saturation has been used to measure the electron spin relaxation parameter t1t2 at temperatures between 10 and 50 k for a variety of s = 1/2 species including : cua and cytochrome a of cytochrome c oxidase , the type 1 copper in several blue copper proteins , the type 2 copper in laccase , inorganic cu ( ii ) complexes , sulfur radicals , and low spin heme proteins .
C0010798
cytochrome
C0018974
heme proteins