Difference K2 and k2

[rearicd]

I am knitting a lace pattern that goes like this:

Row 1: K2, P2, K3, yo, k2, ssk, k2tog, k2, yo, k2, P2, K2

Just wondering if there is something different when it's a capital K or little k? The list of abbreviations doesn't mention anything and the pattern is looking good but wondering why/if there is meaning to using big K and little k in pattern?

Thanks!