It is safe to say "Where there is a graviton there is also gravity." I
like the paper(posted it many times) that Scherk,and Schwartz came up
with.in 1972 That in quantum gravity the aggravation is massless and
has spin 2 That is by the way twice as fast as photon's spin. My spin
is in theory tells that spin 2 makes the graviton very heavy(high
inertia),and that can explain a lot of the mysteries of the graviton
Bert