SPOCK2 GI:197313714 sparc/osteonectin, cwcv and kazal-like domains proteoglycan (testican) 2 isoform 1 1 mrapgcgrlv lpllllaaaa laegdakglk egetpgnfme deqwlssisq 50 51 ysgkikhwnr frdvpssdpp sttqatp