'comprised the core of' is a correct and usable phrase in written English.
It means that something is made up of or consists of the essential or most important parts of something. For example, "The research project comprised the core of my graduate studies and was the focus of my dissertation."
Unlike two decades ago, when President Ronald Reagan cited the work of Arthur Laffer to argue that tax cuts could actually increase government revenues, currently the supply-sider position does not comprise the core of the administration's publicly stated rationale for a tax cut.
And it has been claimed that his blood-curdling video threat to Alawites, who comprise the core of the Assad regime's support, is often taken out of context, since he directed his meat-grinder rant only at those Alawites who were actively suppressing the revolt; any of them who stayed neutral, he insisted, should be protected as equal citizens.
"The AnchorOps team will comprise the core of FastPay's payment business and we intend to continue investing it and growing the team," Simon said.
The third to tenth steps comprise the core of the decision tree modeling algorithm, which will be discussed in the next section.
Although the Senate immigration reform bill was rushed, overly complicated and flawed, it may comprise the core of a future reform plan.
A number of collagen types have important structural roles, either comprising the core of the fibril or decorating the fibril surface to give enhanced functionality.
Neville felt that was the right call because it will provide the younger defenders in the squad - who will comprise the core of the group in years to come - with vital tournament experience.
A SNA was conducted of the governance network shaping a regional MSP initiative in the New England region of the U.S. from 2012 to 2014, focusing in particular on a subset of key collaborators comprising the core of this network.
The par-titioning-defective or PAR proteins comprise the core of an essential cell polarity network that underlies polarization in a wide variety of cell types and developmental contexts.
It would be worthwhile, for instance, to establish whether or not similar functional relationships hold for LRT systems that comprise the core of their urban area's transit network (e.g., Portland Oregon's MAX system or Calgary's C-Train network), and for urban areas with characteristics different than the New York/New Jersey metropolitan region.
