The phrase "allows the portion of" is correct and usable in written English.
It can be used when discussing the ability or permission to include a specific part or segment of something.
Example: "The new policy allows the portion of the budget allocated for training to be increased."
Alternatives: "permits the segment of" or "enables the part of".
So instead of relishing a solid outing from Brown and another blue-collar effort from Hideki Matsui, the Yankees allowed the portion of the game that they dominate to turn into a dreadful experience.
The incongruent information due to LGT will be diluted by conflicting LGT patterns from other loci, allowing the portion of phylogenetic information due to vertical descent to dictate tree structure.
This result might be explained by the fact that our findings predict a very drastic conformational change in the protein molecule to allow the portion of polypeptide chain involved in the contacts to adopt the conformation required for the contacts to be established.
This approach allows disentangling the portion of phenotypic variation due to additive genetic variance from other sources of variance.
This approach allows for the portioning of variance and covariance between each of the levels.
The flexible propanoate arm allowed the coumarin portion of compound 2 to extend at 90° relative to the face of the flavin ring into the centre of the ligand-binding site.
The plan allows deductions for the portion of the expenses not covered by insurance.
Females have a large capillary bed behind their vaginal walls that is semi-permeable to blood, allowing the clear portion of that blood to flow through.
Joy's bill, which eventually failed, would have allowed the northern portion of the state to retain the name Maine, while the southern section would have been ordained Northern Massachusetts -- strange, considering the two states don't share a border.
