The phrase "ancient existing" is not correct and does not convey a clear meaning in written English.
It may be intended to describe something that has existed for a long time, but the combination of the two words is awkward and unclear.
Example: "The ancient existing ruins of the temple tell a story of a civilization long gone."
Alternatives: "long-standing" or "historically present".
The genes encoding SET-domain proteins are ancient, existing in prokaryotes and eukaryotes, but have proliferated and evolved novel functions connected with the appearance of eukaryotes [ 6].
The genes encoding proteins that contain SET-domain sequences (SET-domain genes) are ancient, existing in the Bacterial Domain of life [ 1], but have proliferated and evolved novel functions connected with the appearance of eukaryotes.
The next year, Emir Feisal, who organized the Arab revolt against the Ottoman empire and tried to create a united Arab nation, signed a cooperation agreement with the Zionist leader Chaim Weizmann that declared the two were "mindful of the racial kinship and ancient bonds existing between the Arabs and the Jewish people".
"In South Africa at the moment you have this ancient culture existing with the future at the same time," Suzuki said.
Apparently, these genes are of an ancient origin existing before the divergence of the three kingdoms.
Unlike the adaptive immune system only found in vertebrates, the innate immune system is a universal and evolutionarily ancient mechanism existing in all multicellular organisms [ 1].
Shen used ancient texts and existing models of armillary spheres to create one based on ancient standards; Shen described ancient weaponry such as the use of a scaled sighting device on crossbows; while experimenting with ancient musical measures, Shen suggested hanging an ancient bell by using a hollow handle.
3) We have noted in our discussion of nitrogenase evolution that ambiguity still exists as we cannot exclude the possibility of an ancient shared nitrogenase existing prior to the present nitrogenase complexes in Melainabacteria and Cyanobacteria.
Its rejuvenation, therefore, drew not only on "ancient texts" but existing dialects of the language spoken in various Jewish communities at the turn of the 20th century.
Of the three surviving parts of the Syntagma musicum, the most important is Vol. II, which describes and classifies many ancient and all existing musical instruments.
Such creation should aim to link and expand existing ancient semi-natural woodland blocks to maximise colonisation by wildlife and to facilitate sustainable management (bringing life-giving light into woodland that is so important to a wide diversity of woodland flowers, butterflies and much else).
