Table 4.

Identification of proteins from fetal bovine articular cartilage that associate with collagen α1(XI) NTD by affinity chromatography-mass spectrometry.

Extracted proteins found to associate with the Collagen XI (α1) NTD
Protein namea	Common Abbreviationb	Mr Pred.c (kDa)	Mr Experimentald (kDa)	Peptides Matchese	Seq.cov.(%)f
Extracellular Matrix Proteoglycans
Biglycan	BGN	41.6	240,140,120,100,75	14	40
Fibromodulin	FMOD	42.9	140,130,120,100,75	7	15
Chondroadherin	CHAD	40.8	35	12	37
Heparan sulfate proteoglycan 2	HSPG2	46.8	240,180	12	4
Epiphycan	EPYC	36.8	240,230	4	11
Extracellular Matrix Structural Proteins
Cartilage Oligomeric Matrix Protein	COMP	139.3	120	18	60
Thrombospondin-1	THBS1	129.5	120	24	34
Thrombospondin-Amino terminal like domain	THBS1N	25	38,35,32,28,25	7	43
Matrilin-1(Cartilage Matrix Protein)	MATN1	54	60, 55,38,35, 25	19	51
Matrilin-3	MATN3	52.8	120	4	12
Collagen alpha 1 (II)	COL2A1	134.4	140	10	8
Chondrocalcin	CPPCII	27.4	75, 38,35,32,30, 25	9	40
Collagen alpha 1 (IX)	COL9A1	92.9	130,120,100	9	13
Collagen alpha 1 (XI)	COL11A1	61.7	32,25	16	33
Collagen alpha 2(XI) amino propeptide	PARP	20.9	38,32,30, 28,25, 20	16	86
Collagen alpha 1(XII)	COL12A1	315	180,160,100,75	34	16
Collagen alpha 1 (XIV)	COL14A1	202.4	120	13	10

^aFull name of reference sequence;

^bCommon protein abbreviation;

^cPredicted Mr according to NCBI;

^dExperimental Mr calculated by analysis of gel images;

^eNumber of peptide matches corresponding to the reference sequence;

^fSequence coverage calculated as the number of amino acids identified of the total number of amino acids in reference sequence.