A result of Robinson states that no OD(n; 1, 1, 1, 1, 1, n− 5) exists for n > 40. We complement this result by showing the existence of OD(n; 1, 1, 1, 1, 1, n− 5) for n = 32, 40. This includes a resolution to an old open problem regarding orthogonal designs of order 32 as well. We also obtain a number of new orthogonal designs of order 32.

The interaction of bovine respiratory syncytial virus (BRSV) nucleocapsid protein (N) with itself and phosphoprotein (P) was investigated using the yeast two-hybrid system. N-P interaction was abolished by any of a series of internal deletions or deletions at the C terminus. In contrast, removal of up to 32 amino acids from the N terminus had little effect. Interestingly, while removal of the C...