Because the tight correlation between syndecan-4 and growth factors, the efficiency of angiogenic therapies have been thought to relate to syndecan-4.

The masses of the black holes correlate tightly with bulge properties; the tightest such correlation, the M-sigma relation, is between black hole mass and the velocity dispersion of stars in the bulge.

There is a tight correlation between the mass of the black hole and the velocity dispersion of the stars in the bulge, the M-sigma relation.

Since the 1970s the 10 Year Treasury Note and the 30 year fixed mortgage have had a very tight correlation.

This tight correlation again shows the reproducibility of the amplification procedure.

Also, it has been proposed that the mechanism of KNOX gene action is conserved across all vascular plants, because there is a tight correlation between KNOX expression and a complex leaf morphology.

The can be inferred from the tight correlation in water temperatures of the Danube and Aachtopf spring which matches the behaviour of an underground river better than a branching system.

This has allowed for a tight correlation of the age of the gault with other geological units in Europe, under the science of biostratigraphy.

Earlier, Henrietta Levitt, part of a group of female astronomers working at Harvard College Observatory, had shown there was a tight correlation between the period of a Cepheid variable star and its luminosity (intrinsic brightness).

The paper's authors found a surprisingly tight correlation between a person's power of estimation and his or her ability calculate the power of a number.